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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2023-02-06</periodOfReport>

    <dateOfOriginalSubmission>2023-02-17</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001041657</issuerCik>
        <issuerName>URBAN ONE, INC.</issuerName>
        <issuerTradingSymbol>UONE/UONEK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001106637</rptOwnerCik>
            <rptOwnerName>HUGHES CATHERINE L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5900 PRINCESS GARDEN PARKWAY 8TH FL</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LANHAM</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20706</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairperson &amp; Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class D Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2023-02-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>165883</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4697088</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class D Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-02-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>55008</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.15</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4642080</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Class D)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.15</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-02-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>101272</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2023-02-06</value>
            </exerciseDate>
            <expirationDate>
                <value>2033-02-06</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class D Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>101272</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1365311</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4A is being filed is to adjust ownership totals due to a rounding error in the calculation method in relation to a February 2023 grant vesting.  The Amendment increases Class D Common Stock ownership by 6,144 shares and option ownership by 3,751 options to purchase Class D shares.</footnote>
        <footnote id="F2">Award vested immediately upon pricing.</footnote>
        <footnote id="F3">Urban One, Inc. has four classes of stock, Classes A, B, C, and D. Across all classes the reporting persons owns Urban One, Inc. stock as follows: (1) zero shares of Class A common stock (exclusive of Class A RSUs noted in footnote 4 below); (2) 851,536 shares of Class B common stock held by the Hughes Revocable Trust; (3) 247,366 shares of Class C common stock held by the Hughes Revocable Trust U/A/D; (4) 1,124,560 shares of Class C common stock held by Dynastic Trust U/A/D; (5) 15,605 shares of Class C common stock held by the Hughes-Liggins Co., LLC; (continued in next footnote)</footnote>
        <footnote id="F4">(continued from previous footnote) (6) 825,938 shares of Class D common stock held by the Catherine Hughes; (7) 1,015,937 shares of Class D common stock held by the Hughes Revocable Trust; (8) 494,732 shares of Class D common stock held by the Hughes Revocable Trust U/A/D; (cont.) and (9) 1,749,464 shares of Class D common stock held by the Hughes Revocable Trust UA; (10) 520,404 shares of Class D Common Stock held by the Dynastic Trust U/A/D; and (11) 31,499 shares of Class D common stock held by the Hughes-Liggins Co., LLC.</footnote>
        <footnote id="F5">The reporting person also holds 281,250 Restricted Class A Stock Units in addition to the derivative securities reported in Table II.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Karen Wishart</signatureName>
        <signatureDate>2023-10-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
