<SEC-DOCUMENT>0001628280-21-013784.txt : 20210713
<SEC-HEADER>0001628280-21-013784.hdr.sgml : 20210713
<ACCEPTANCE-DATETIME>20210713161028
ACCESSION NUMBER:		0001628280-21-013784
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210706
FILED AS OF DATE:		20210713
DATE AS OF CHANGE:		20210713

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ruffner Katherine L
		CENTRAL INDEX KEY:			0001872306

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35558
		FILM NUMBER:		211088006

	MAIL ADDRESS:	
		STREET 1:		11055 FLINTKOTE AVENUE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cardiff Oncology, Inc.
		CENTRAL INDEX KEY:			0001213037
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				272004382
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11055 FLINTKOTE AVENUE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		858-952-7570

	MAIL ADDRESS:	
		STREET 1:		11055 FLINTKOTE AVENUE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Trovagene, Inc.
		DATE OF NAME CHANGE:	20130304

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TrovaGene Inc.
		DATE OF NAME CHANGE:	20110830

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	XENOMICS INC
		DATE OF NAME CHANGE:	20040719
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>wf-form3_162620699893450.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-07-06</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001213037</issuerCik>
        <issuerName>Cardiff Oncology, Inc.</issuerName>
        <issuerTradingSymbol>CRDF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001872306</rptOwnerCik>
            <rptOwnerName>Ruffner Katherine L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>11055 FLINTKOTE AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>C/O CARDIFF ONCOLOGY, INC.</rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92121</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Medical Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Katherine Ruffner</signatureName>
        <signatureDate>2021-07-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
