    <SEC-DOCUMENT>0001654954-18-003269-index.html : 20180328
    <SEC-HEADER>0001654954-18-003269.hdr.sgml : 20180328
    <ACCEPTANCE-DATETIME>20180328133412
    ACCESSION NUMBER:		0001654954-18-003269
    CONFORMED SUBMISSION TYPE:	40-F
    PUBLIC DOCUMENT COUNT:		28
    CONFORMED PERIOD OF REPORT:	20171231
    FILED AS OF DATE:		20180328
    DATE AS OF CHANGE:		20180328

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			DENISON MINES CORP.
    		CENTRAL INDEX KEY:			0001063259
    		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS METAL ORES [1090]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			A6
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		40-F
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-33414
    		FILM NUMBER:		18717874

    	BUSINESS ADDRESS:
    		STREET 1:		40 UNIVERSITY AVE., SUITE 1100
    		CITY:			TORONTO
    		STATE:			A6
    		ZIP:			M5J 1T1
    		BUSINESS PHONE:		(416) 979-1991

    	MAIL ADDRESS:
    		STREET 1:		40 UNIVERSITY AVE., SUITE 1100
    		CITY:			TORONTO
    		STATE:			A6
    		ZIP:			M5J 1T1

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	INTERNATIONAL URANIUM CORP
    		DATE OF NAME CHANGE:	19980603
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>40-F
    <SEQUENCE>1
    <FILENAME>denison-form40fye2017v3.htm
    <DESCRIPTION>FORM 40-F DATED MARCH 30, 2018
    <TEXT>
    Document 1 - file: denison-form40fye2017v3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.3
    <SEQUENCE>2
    <FILENAME>denison-aifedgar.htm
    <DESCRIPTION>ANNUAL INFORMATION FORM FOR YEAR ENDED DECEMBER 31, 2017
    <TEXT>
    Document 2 - file: denison-aifedgar.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.4
    <SEQUENCE>3
    <FILENAME>ex99-4auditorconsent.htm
    <DESCRIPTION>CONSENT - PRICEWATERHOUSECOOPERS LLP
    <TEXT>
    Document 3 - file: ex99-4auditorconsent.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.5
    <SEQUENCE>4
    <FILENAME>officers_certificationsco.htm
    <DESCRIPTION>OFFICER'S CERTIFICATIONS REQUIRED BY RULE 13A-14(A) OR RULE 15(D)-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934
    <TEXT>
    Document 4 - file: officers_certificationsco.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.6
    <SEQUENCE>5
    <FILENAME>officers_certificationsco000.htm
    <DESCRIPTION>OFFICER'S CERTIFICATIONS REQUIRED BY RULE 13A-14(B) OR RULE 15(D)-14(B) OF THE SECURITIES EXCHANGE ACT OF 1934
    <TEXT>
    Document 5 - file: officers_certificationsco000.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.7
    <SEQUENCE>6
    <FILENAME>ex99-7rpaconsent.htm
    <DESCRIPTION>CONSENT - ROSCOE POSTLE ASSOCIATES INC.
    <TEXT>
    Document 6 - file: ex99-7rpaconsent.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.8
    <SEQUENCE>7
    <FILENAME>ex99-8mathisenconsent.htm
    <DESCRIPTION>CONSENT - MATHISEN
    <TEXT>
    Document 7 - file: ex99-8mathisenconsent.htm

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    <DOCUMENT>
    <TYPE>EX-99.9
    <SEQUENCE>8
    <FILENAME>ex99-9srkconsent.htm
    <DESCRIPTION>CONSENT - SRK CONSULTING (CANADA) INC.
    <TEXT>
    Document 8 - file: ex99-9srkconsent.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.10
    <SEQUENCE>9
    <FILENAME>ex99-10reipasconsent.htm
    <DESCRIPTION>CONSENT - REIPAS
    <TEXT>
    Document 9 - file: ex99-10reipasconsent.htm

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    <DOCUMENT>
    <TYPE>EX-99.11
    <SEQUENCE>10
    <FILENAME>ex99-11geovectorconsent.htm
    <DESCRIPTION>CONSENT - GEOVECTOR MANAGEMENT INC.
    <TEXT>
    Document 10 - file: ex99-11geovectorconsent.htm

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    <DOCUMENT>
    <TYPE>EX-99.12
    <SEQUENCE>11
    <FILENAME>ex99-12sextonconsent.htm
    <DESCRIPTION>CONSENT - SEXTON
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    Document 11 - file: ex99-12sextonconsent.htm

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    <SEQUENCE>12
    <FILENAME>ex99-13armitageconsent.htm
    <DESCRIPTION>CONSENT - ARMITAGE
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    Document 12 - file: ex99-13armitageconsent.htm

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    <SEQUENCE>13
    <FILENAME>ex99-14routledgeconsent.htm
    <DESCRIPTION>CONSENT - ROUTLEDGE
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    Document 13 - file: ex99-14routledgeconsent.htm

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    <SEQUENCE>14
    <FILENAME>ex99-15kellerconsent.htm
    <DESCRIPTION>CONSENT - KELLER
    <TEXT>
    Document 14 - file: ex99-15kellerconsent.htm

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    <TYPE>EX-99.16
    <SEQUENCE>15
    <FILENAME>ex-9916leuangthongconsent.htm
    <DESCRIPTION>CONSENT - LEUANGTHONG
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    Document 15 - file: ex-9916leuangthongconsent.htm

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    <SEQUENCE>16
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    <DESCRIPTION>CONSENT - VERRAN
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    Document 16 - file: ex99-17verranconsent.htm

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    <SEQUENCE>17
    <FILENAME>ex99-18sorbaconsent.htm
    <DESCRIPTION>CONSENT - SORBA
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    Document 17 - file: ex99-18sorbaconsent.htm

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    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>corpchart.jpg
    <DESCRIPTION>IMAGE
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    Document 18 - file: corpchart.jpg

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    <SEQUENCE>19
    <FILENAME>denison-aifedgar000.jpg
    <DESCRIPTION>IMAGE
    <TEXT>
    Document 19 - file: denison-aifedgar000.jpg

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    <SEQUENCE>20
    <FILENAME>denison-aifedgar001.jpg
    <DESCRIPTION>IMAGE
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    Document 20 - file: denison-aifedgar001.jpg

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    <SEQUENCE>21
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    Document 21 - file: denison-aifedgar002.jpg

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    Document 22 - file: denison-aifedgar003.jpg

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    <SEQUENCE>23
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    <TEXT>
    Document 23 - file: denison-aifedgar004.jpg

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    <SEQUENCE>24
    <FILENAME>denison-aifedgar005.jpg
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    <TEXT>
    Document 24 - file: denison-aifedgar005.jpg

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    <SEQUENCE>25
    <FILENAME>denison-aifedgar006.jpg
    <DESCRIPTION>IMAGE
    <TEXT>
    Document 25 - file: denison-aifedgar006.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>ex99-4auditorconsent000.jpg
    <DESCRIPTION>IMAGE
    <TEXT>
    Document 26 - file: ex99-4auditorconsent000.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>ex99-9srkconsent000.jpg
    <DESCRIPTION>IMAGE
    <TEXT>
    Document 27 - file: ex99-9srkconsent000.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>rpa.jpg
    <DESCRIPTION>IMAGE
    <TEXT>
    Document 28 - file: rpa.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>