<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2009-02-02</finalEffectivenessDispDate>
        <accessionNumber>0001193125-09-003747</accessionNumber>
        <submissionType>485APOS</submissionType>
        <filer>
            <cik>0000872649</cik>
            <entityName>LOOMIS SAYLES FUNDS II</entityName>
            <fileNumber>033-39133</fileNumber>
            <seriesClassContractData>
                <existing>
                    <seriesId>S000006695</seriesId>
                    <seriesName>Loomis Sayles Mid Cap Growth Fund</seriesName>
                    <classContractId>C000018222</classContractId>
                    <classContractName>Institutional Class</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006695</seriesId>
                    <seriesName>Loomis Sayles Mid Cap Growth Fund</seriesName>
                    <classContractId>C000018223</classContractId>
                    <classContractName>Retail Class</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006695</seriesId>
                    <seriesName>Loomis Sayles Mid Cap Growth Fund</seriesName>
                    <classContractId>C000075148</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006697</seriesId>
                    <seriesName>Loomis Sayles Value Fund</seriesName>
                    <classContractId>C000018225</classContractId>
                    <classContractName>Loomis Sayles Value Fund - Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006697</seriesId>
                    <seriesName>Loomis Sayles Value Fund</seriesName>
                    <classContractId>C000034548</classContractId>
                    <classContractName>Loomis Sayles Value Fund - Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006697</seriesId>
                    <seriesName>Loomis Sayles Value Fund</seriesName>
                    <classContractId>C000049398</classContractId>
                    <classContractName>Loomis Sayles Value Fund - Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006697</seriesId>
                    <seriesName>Loomis Sayles Value Fund</seriesName>
                    <classContractId>C000049399</classContractId>
                    <classContractName>Loomis Sayles Value Fund - Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006698</seriesId>
                    <seriesName>Loomis Sayles Global Markets Fund</seriesName>
                    <classContractId>C000018226</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006698</seriesId>
                    <seriesName>Loomis Sayles Global Markets Fund</seriesName>
                    <classContractId>C000027670</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006698</seriesId>
                    <seriesName>Loomis Sayles Global Markets Fund</seriesName>
                    <classContractId>C000027671</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006699</seriesId>
                    <seriesName>Loomis Sayles Growth Fund</seriesName>
                    <classContractId>C000018227</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006699</seriesId>
                    <seriesName>Loomis Sayles Growth Fund</seriesName>
                    <classContractId>C000018228</classContractId>
                    <classContractName>Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006699</seriesId>
                    <seriesName>Loomis Sayles Growth Fund</seriesName>
                    <classContractId>C000018229</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006699</seriesId>
                    <seriesName>Loomis Sayles Growth Fund</seriesName>
                    <classContractId>C000018230</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006700</seriesId>
                    <seriesName>Loomis Sayles High Income Fund</seriesName>
                    <classContractId>C000018231</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006700</seriesId>
                    <seriesName>Loomis Sayles High Income Fund</seriesName>
                    <classContractId>C000018232</classContractId>
                    <classContractName>Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006700</seriesId>
                    <seriesName>Loomis Sayles High Income Fund</seriesName>
                    <classContractId>C000018233</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006700</seriesId>
                    <seriesName>Loomis Sayles High Income Fund</seriesName>
                    <classContractId>C000069253</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006701</seriesId>
                    <seriesName>Loomis Sayles Investment Grade Bond Fund</seriesName>
                    <classContractId>C000018234</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006701</seriesId>
                    <seriesName>Loomis Sayles Investment Grade Bond Fund</seriesName>
                    <classContractId>C000018235</classContractId>
                    <classContractName>Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006701</seriesId>
                    <seriesName>Loomis Sayles Investment Grade Bond Fund</seriesName>
                    <classContractId>C000018236</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006701</seriesId>
                    <seriesName>Loomis Sayles Investment Grade Bond Fund</seriesName>
                    <classContractId>C000018237</classContractId>
                    <classContractName>Class J</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006701</seriesId>
                    <seriesName>Loomis Sayles Investment Grade Bond Fund</seriesName>
                    <classContractId>C000018238</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006702</seriesId>
                    <seriesName>Loomis Sayles Limited Term Government and Agency Fund</seriesName>
                    <classContractId>C000018239</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006702</seriesId>
                    <seriesName>Loomis Sayles Limited Term Government and Agency Fund</seriesName>
                    <classContractId>C000018240</classContractId>
                    <classContractName>Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006702</seriesId>
                    <seriesName>Loomis Sayles Limited Term Government and Agency Fund</seriesName>
                    <classContractId>C000018241</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006702</seriesId>
                    <seriesName>Loomis Sayles Limited Term Government and Agency Fund</seriesName>
                    <classContractId>C000018242</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006704</seriesId>
                    <seriesName>Loomis Sayles Research Fund</seriesName>
                    <classContractId>C000018245</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006704</seriesId>
                    <seriesName>Loomis Sayles Research Fund</seriesName>
                    <classContractId>C000018246</classContractId>
                    <classContractName>Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006704</seriesId>
                    <seriesName>Loomis Sayles Research Fund</seriesName>
                    <classContractId>C000018247</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006704</seriesId>
                    <seriesName>Loomis Sayles Research Fund</seriesName>
                    <classContractId>C000018248</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006705</seriesId>
                    <seriesName>Loomis Sayles Small Cap Growth Fund</seriesName>
                    <classContractId>C000018249</classContractId>
                    <classContractName>Institutional Class</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006705</seriesId>
                    <seriesName>Loomis Sayles Small Cap Growth Fund</seriesName>
                    <classContractId>C000018250</classContractId>
                    <classContractName>Retail Class</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006706</seriesId>
                    <seriesName>Loomis Sayles Strategic Income Fund</seriesName>
                    <classContractId>C000018251</classContractId>
                    <classContractName>Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006706</seriesId>
                    <seriesName>Loomis Sayles Strategic Income Fund</seriesName>
                    <classContractId>C000018252</classContractId>
                    <classContractName>Class B</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006706</seriesId>
                    <seriesName>Loomis Sayles Strategic Income Fund</seriesName>
                    <classContractId>C000018253</classContractId>
                    <classContractName>Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006706</seriesId>
                    <seriesName>Loomis Sayles Strategic Income Fund</seriesName>
                    <classContractId>C000018254</classContractId>
                    <classContractName>Class Y</classContractName>
                </existing>
                <existing>
                    <seriesId>S000020816</seriesId>
                    <seriesName>Loomis Sayles International Bond Fund</seriesName>
                    <classContractId>C000058150</classContractId>
                    <classContractName>Loomis Sayles International Bond Fund- Class A</classContractName>
                </existing>
                <existing>
                    <seriesId>S000020816</seriesId>
                    <seriesName>Loomis Sayles International Bond Fund</seriesName>
                    <classContractId>C000058151</classContractId>
                    <classContractName>Loomis Sayles International Bond Fund- Class C</classContractName>
                </existing>
                <existing>
                    <seriesId>S000020816</seriesId>
                    <seriesName>Loomis Sayles International Bond Fund</seriesName>
                    <classContractId>C000058152</classContractId>
                    <classContractName>Loomis Sayles International Bond Fund- Class Y</classContractName>
                </existing>
            </seriesClassContractData>
        </filer>
    </effectiveData>
</edgarSubmission>
