<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xsi:schemaLocation="http://www.sec.gov/edgar/nmfp3 eis_NMFP3_Filer.xsd" xmlns="http://www.sec.gov/edgar/nmfp3" xmlns:ns3="http://www.sec.gov/edgar/nmfp3common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <headerData>
    <submissionType>N-MFP3</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0000035315</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
    </filerInfo>
  </headerData>
  <formData>
    <generalInfo>
      <reportDate>2025-05-31</reportDate>
      <registrantFullName>Fidelity Salem Street Trust</registrantFullName>
      <cik>0000035315</cik>
      <registrantLEIId>S4W85DGKOEJ24DPRB829</registrantLEIId>
      <nameOfSeries>Fidelity SAI Municipal Money Market Fund</nameOfSeries>
      <leiOfSeries>5493009807C34QG2U580</leiOfSeries>
      <seriesId>S000059873</seriesId>
      <totalShareClassesInSeries>1</totalShareClassesInSeries>
      <finalFilingFlag>N</finalFilingFlag>
      <fundAcqrdOrMrgdWthAnthrFlag>N</fundAcqrdOrMrgdWthAnthrFlag>
    </generalInfo>
    <seriesLevelInfo>
      <securitiesActFileNumber>002-41839</securitiesActFileNumber>
      <adviser>
        <adviserName>Fidelity Management &amp; Research Company LLC</adviserName>
        <adviserFileNumber>801-07884</adviserFileNumber>
      </adviser>
      <subAdviser>
        <adviserName>Fidelity Management &amp; Research (Hong Kong) Limited</adviserName>
        <adviserFileNumber>801-69507</adviserFileNumber>
      </subAdviser>
      <subAdviser>
        <adviserName>FMR Investment Management (UK) Limited</adviserName>
        <adviserFileNumber>801-28773</adviserFileNumber>
      </subAdviser>
      <subAdviser>
        <adviserName>Fidelity Management &amp; Research (Japan) Limited</adviserName>
        <adviserFileNumber>801-69571</adviserFileNumber>
      </subAdviser>
      <indpPubAccountant>
        <name>PricewaterhouseCoopers LLP</name>
        <city>Boston</city>
        <stateCountry>MA</stateCountry>
      </indpPubAccountant>
      <administrator>
        <administratorName>Fidelity Service Company</administratorName>
      </administrator>
      <transferAgent>
        <name>Fidelity Investments Institutional Operations Company LLC</name>
        <cik>0000862124</cik>
        <fileNumber>084-01839</fileNumber>
      </transferAgent>
      <feederFundFlag>N</feederFundFlag>
      <masterFundFlag>N</masterFundFlag>
      <seriesFundInsuCmpnySepAccntFlag>N</seriesFundInsuCmpnySepAccntFlag>
      <moneyMarketFundCategory>Other Tax Exempt</moneyMarketFundCategory>
      <fundRetailMoneyMarketFlag>N</fundRetailMoneyMarketFlag>
      <averagePortfolioMaturity>7</averagePortfolioMaturity>
      <averageLifeMaturity>7</averageLifeMaturity>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43877053.09</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-01</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43871711.93</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-02</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43871711.93</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-05</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43871711.93</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-06</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43871711.93</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-07</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43871711.93</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-08</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43871711.93</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-09</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43872480.51</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-12</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43872480.51</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-13</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43872480.51</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-14</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43872480.51</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-15</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43872480.51</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-16</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839859.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-19</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839859.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-20</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839859.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-21</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839859.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-22</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839859.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-23</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839859.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-27</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839852.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-28</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839852.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-29</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <liquidAssetsDetails>
        <totalValueWeeklyLiquidAssets>43839852.97</totalValueWeeklyLiquidAssets>
        <percentageWeeklyLiquidAssets>0.9900</percentageWeeklyLiquidAssets>
        <totalLiquidAssetsNearPercentDate>2025-05-30</totalLiquidAssetsNearPercentDate>
      </liquidAssetsDetails>
      <cash>0.00</cash>
      <totalValuePortfolioSecurities>43866697.64</totalValuePortfolioSecurities>
      <amortizedCostPortfolioSecurities>43867053.09</amortizedCostPortfolioSecurities>
      <totalValueOtherAssets>194689.35</totalValueOtherAssets>
      <totalValueLiabilities>134829.12</totalValueLiabilities>
      <netAssetOfSeries>43926913.32</netAssetOfSeries>
      <numberOfSharesOutstanding>43917906.6800</numberOfSharesOutstanding>
      <seekStablePricePerShare>N</seekStablePricePerShare>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0318</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-01</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0302</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-02</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0237</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-05</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0214</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-06</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0192</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-07</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0174</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-08</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0166</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-09</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0189</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-12</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0207</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-13</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0231</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-14</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0260</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-15</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0284</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-16</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0327</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-19</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0328</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-20</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0320</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-21</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0302</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-22</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0293</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-23</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0259</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-27</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0250</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-28</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0243</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-29</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <sevenDayGrossYield>
        <sevenDayGrossYieldValue>0.0235</sevenDayGrossYieldValue>
        <sevenDayGrossYieldDate>2025-05-30</sevenDayGrossYieldDate>
      </sevenDayGrossYield>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-01</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-02</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-05</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-06</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-07</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-08</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-09</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-12</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-13</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-14</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-15</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-16</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-19</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-20</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-21</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-22</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-23</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-27</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-28</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-29</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareSeries>1.0002</dailyNetAssetValuePerShareSeries>
        <dailyNetAssetValuePerShareDateSeries>2025-05-30</dailyNetAssetValuePerShareDateSeries>
      </dailyNetAssetValuePerShareSeries>
      <cashMgmtVehicleAffliatedFundFlag>Y</cashMgmtVehicleAffliatedFundFlag>
      <liquidityFeeFundApplyFlag>N</liquidityFeeFundApplyFlag>
    </seriesLevelInfo>
    <classLevelInfo>
      <classFullName>Fidelity SAI Municipal Money Market Fund</classFullName>
      <classesId>C000195869</classesId>
      <minInitialInvestment>1.00</minInitialInvestment>
      <netAssetsOfClass>43926913.32</netAssetsOfClass>
      <numberOfSharesOutstanding>43917906.6800</numberOfSharesOutstanding>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-01</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-02</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-05</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-06</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-07</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-08</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-09</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-12</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-13</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-14</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-15</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-16</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-19</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-20</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-21</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-22</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-23</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-27</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-28</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-29</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareClass>1.0002</dailyNetAssetValuePerShareClass>
        <dailyNetAssetValuePerShareDateClass>2025-05-30</dailyNetAssetValuePerShareDateClass>
      </dailyNetAssetValuePerShareClass>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>131312.96</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-01</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-02</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-05</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-06</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-07</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-08</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-09</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-12</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-13</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-14</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-15</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-16</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-19</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-20</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-21</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-22</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-23</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-27</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-28</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-29</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <dialyShareholderFlowReported>
        <dailyGrossSubscriptions>0.00</dailyGrossSubscriptions>
        <dailyGrossRedemptions>0.00</dailyGrossRedemptions>
        <dailyShareHolderFlowDate>2025-05-30</dailyShareHolderFlowDate>
      </dialyShareholderFlowReported>
      <monthlyShareholderFlowReported>
        <totalGrossSubscriptions>131312.96</totalGrossSubscriptions>
        <totalGrossRedemptions>0.00</totalGrossRedemptions>
      </monthlyShareholderFlowReported>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0311</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-01</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0295</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-02</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0230</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-05</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0207</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-06</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0185</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-07</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0167</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-08</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0159</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-09</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0182</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-12</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0200</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-13</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0224</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-14</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0253</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-15</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0277</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-16</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0320</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-19</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0321</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-20</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0313</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-21</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0295</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-22</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0286</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-23</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0252</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-27</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0243</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-28</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0236</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-29</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <sevenDayNetYield>
        <sevenDayNetYieldValue>0.0228</sevenDayNetYieldValue>
        <sevenDayNetYieldDate>2025-05-30</sevenDayNetYieldDate>
      </sevenDayNetYield>
      <personPayForFundFlag>Y</personPayForFundFlag>
      <nameOfPersonDescExpensePay>9632.11</nameOfPersonDescExpensePay>
      <beneficialRecordOwnerCategory>
        <beneficialRecordOwnerCategoryType>Registered investment company</beneficialRecordOwnerCategoryType>
        <percentOutstandingSharesRecord>0.9997</percentOutstandingSharesRecord>
        <percentOutstandingSharesBeneficial>0.0000</percentOutstandingSharesBeneficial>
      </beneficialRecordOwnerCategory>
      <percentShareHolderCompNonFinancialCorp>0.0000</percentShareHolderCompNonFinancialCorp>
      <percentShareHolderCompPensionPlan>0.0000</percentShareHolderCompPensionPlan>
      <percentShareHolderCompNonProfit>0.0000</percentShareHolderCompNonProfit>
      <percentShareHolderCompMunicipal>0.0000</percentShareHolderCompMunicipal>
      <percentShareHolderCompRegInvestment>0.9997</percentShareHolderCompRegInvestment>
      <percentShareHolderCompPrivateFunds>0.0000</percentShareHolderCompPrivateFunds>
      <percentShareHolderCompDepositoryInst>0.0000</percentShareHolderCompDepositoryInst>
      <percentShareHolderCompSovereignFund>0.0000</percentShareHolderCompSovereignFund>
      <percentShareHolderCompBrokerDealer>0.0000</percentShareHolderCompBrokerDealer>
      <percentShareHolderCompInsurance>0.0000</percentShareHolderCompInsurance>
      <percentShareHolderCompOther>0.0003</percentShareHolderCompOther>
      <otherInvestorTypeDescription>Affiliated Entity</otherInvestorTypeDescription>
      <shareCancellationReportingPeriod>N</shareCancellationReportingPeriod>
    </classLevelInfo>
    <scheduleOfPortfolioSecuritiesInfo>
      <nameOfIssuer>Fidelity Revere Street Trust</nameOfIssuer>
      <titleOfIssuer>Fidelity Municipal Cash Central Fund</titleOfIssuer>
      <CUSIPMember>31635A204</CUSIPMember>
      <LEIID>549300BDV45LJNXBZC55</LEIID>
      <ISINId>US31635A2042</ISINId>
      <cik>0001022695</cik>
      <otherUniqueId>31635A204</otherUniqueId>
      <investmentCategory>Investment Company</investmentCategory>
      <securityEligibilityFlag>Y</securityEligibilityFlag>
      <assigningNRSRORating>
        <nameOfNRSRO>N/A</nameOfNRSRO>
        <rating>N/A</rating>
      </assigningNRSRORating>
      <investmentMaturityDateWAM>2025-06-06</investmentMaturityDateWAM>
      <investmentMaturityDateWAL>2025-06-06</investmentMaturityDateWAL>
      <finalLegalInvestmentMaturityDate>2099-12-31</finalLegalInvestmentMaturityDate>
      <securityDemandFeatureFlag>N</securityDemandFeatureFlag>
      <securityGuaranteeFlag>N</securityGuaranteeFlag>
      <securityEnhancementsFlag>N</securityEnhancementsFlag>
      <yieldOfTheSecurityAsOfReportingDate>0.0243</yieldOfTheSecurityAsOfReportingDate>
      <includingValueOfAnySponsorSupport>43866697.64</includingValueOfAnySponsorSupport>
      <excludingValueOfAnySponsorSupport>43866697.64</excludingValueOfAnySponsorSupport>
      <percentageOfMoneyMarketFundNetAssets>0.9986</percentageOfMoneyMarketFundNetAssets>
      <securityCategorizedAtLevel3Flag>N</securityCategorizedAtLevel3Flag>
      <dailyLiquidAssetSecurityFlag>N</dailyLiquidAssetSecurityFlag>
      <weeklyLiquidAssetSecurityFlag>Y</weeklyLiquidAssetSecurityFlag>
      <illiquidSecurityFlag>N</illiquidSecurityFlag>
    </scheduleOfPortfolioSecuritiesInfo>
    <dispositionOfPortfolioSecurities/>
    <signature>
      <registrant>Fidelity SAI Municipal Money Market Fund</registrant>
      <signatureDate>2025-06-03</signatureDate>
      <signature>Laura M. Del Prato</signature>
      <nameOfSigningOfficer>Laura M. Del Prato</nameOfSigningOfficer>
      <titleOfSigningOfficer>President and Treasurer</titleOfSigningOfficer>
    </signature>
  </formData>
</edgarSubmission>
