    <SEC-DOCUMENT>0001654954-22-003842-index.html : 20220325
    <SEC-HEADER>0001654954-22-003842.hdr.sgml : 20220325
    <ACCEPTANCE-DATETIME>20220325170212
    ACCESSION NUMBER:		0001654954-22-003842
    CONFORMED SUBMISSION TYPE:	40-F
    PUBLIC DOCUMENT COUNT:		53
    CONFORMED PERIOD OF REPORT:	20211231
    FILED AS OF DATE:		20220325
    DATE AS OF CHANGE:		20220325

    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:		22772204

    	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>dnn_40f.htm
    <DESCRIPTION>FORM 40F
    <TEXT>
    Document 1 - file: dnn_40f.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>dnn_ex991.htm
    <DESCRIPTION>ANNUAL INFORMATION FORM
    <TEXT>
    Document 2 - file: dnn_ex991.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.4
    <SEQUENCE>3
    <FILENAME>dnn_ex994.htm
    <DESCRIPTION>EX-99.4
    <TEXT>
    Document 3 - file: dnn_ex994.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.5
    <SEQUENCE>4
    <FILENAME>dnn_ex995.htm
    <DESCRIPTION>EX-99.5
    <TEXT>
    Document 4 - file: dnn_ex995.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.6
    <SEQUENCE>5
    <FILENAME>dnn_ex996.htm
    <DESCRIPTION>EX-99.6
    <TEXT>
    Document 5 - file: dnn_ex996.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.7
    <SEQUENCE>6
    <FILENAME>dnn_ex997.htm
    <DESCRIPTION>EX-99.7
    <TEXT>
    Document 6 - file: dnn_ex997.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.8
    <SEQUENCE>7
    <FILENAME>dnn_ex998.htm
    <DESCRIPTION>EX-99.8
    <TEXT>
    Document 7 - file: dnn_ex998.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.9
    <SEQUENCE>8
    <FILENAME>dnn_ex999.htm
    <DESCRIPTION>EX-99.9
    <TEXT>
    Document 8 - file: dnn_ex999.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.10
    <SEQUENCE>9
    <FILENAME>dnn_ex9910.htm
    <DESCRIPTION>EX-99.10
    <TEXT>
    Document 9 - file: dnn_ex9910.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.11
    <SEQUENCE>10
    <FILENAME>dnn_ex9911.htm
    <DESCRIPTION>EX-99.11
    <TEXT>
    Document 10 - file: dnn_ex9911.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.12
    <SEQUENCE>11
    <FILENAME>dnn_ex9912.htm
    <DESCRIPTION>EX-99.12
    <TEXT>
    Document 11 - file: dnn_ex9912.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.13
    <SEQUENCE>12
    <FILENAME>dnn_ex9913.htm
    <DESCRIPTION>EX-99.13
    <TEXT>
    Document 12 - file: dnn_ex9913.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.14
    <SEQUENCE>13
    <FILENAME>dnn_ex9914.htm
    <DESCRIPTION>EX-99.14
    <TEXT>
    Document 13 - file: dnn_ex9914.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.15
    <SEQUENCE>14
    <FILENAME>dnn_ex9915.htm
    <DESCRIPTION>EX-99.15
    <TEXT>
    Document 14 - file: dnn_ex9915.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>15
    <FILENAME>dnn-20211231.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 15 - file: dnn-20211231.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>16
    <FILENAME>dnn-20211231_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 16 - file: dnn-20211231_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.CAL
    <SEQUENCE>17
    <FILENAME>dnn-20211231_cal.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE
    <TEXT>
    Document 17 - file: dnn-20211231_cal.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>18
    <FILENAME>dnn-20211231_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 18 - file: dnn-20211231_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>19
    <FILENAME>dnn-20211231_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
    <TEXT>
    Document 19 - file: dnn-20211231_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>dnn_ex991img9.jpg
    <TEXT>
    Document 20 - file: dnn_ex991img9.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>dnn_ex9913img2.gif
    <TEXT>
    Document 21 - file: dnn_ex9913img2.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>dnn_ex9913img3.gif
    <TEXT>
    Document 22 - file: dnn_ex9913img3.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>dnn_ex9913img4.gif
    <TEXT>
    Document 23 - file: dnn_ex9913img4.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>dnn_ex991img1.jpg
    <TEXT>
    Document 24 - file: dnn_ex991img1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>dnn_ex991img10.jpg
    <TEXT>
    Document 25 - file: dnn_ex991img10.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>dnn_ex991img11.jpg
    <TEXT>
    Document 26 - file: dnn_ex991img11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>dnn_ex991img12.jpg
    <TEXT>
    Document 27 - file: dnn_ex991img12.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>dnn_ex991img13.jpg
    <TEXT>
    Document 28 - file: dnn_ex991img13.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>dnn_ex991img16.jpg
    <TEXT>
    Document 29 - file: dnn_ex991img16.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>dnn_ex991img18.jpg
    <TEXT>
    Document 30 - file: dnn_ex991img18.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>dnn_ex991img2.jpg
    <TEXT>
    Document 31 - file: dnn_ex991img2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>dnn_ex991img20.jpg
    <TEXT>
    Document 32 - file: dnn_ex991img20.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>dnn_ex991img3.jpg
    <TEXT>
    Document 33 - file: dnn_ex991img3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>dnn_ex991img5.jpg
    <TEXT>
    Document 34 - file: dnn_ex991img5.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>dnn_ex991img6.jpg
    <TEXT>
    Document 35 - file: dnn_ex991img6.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>dnn_ex991img7.jpg
    <TEXT>
    Document 36 - file: dnn_ex991img7.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>dnn_ex991img8.jpg
    <TEXT>
    Document 37 - file: dnn_ex991img8.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>dnn_ex9913img1.jpg
    <TEXT>
    Document 38 - file: dnn_ex9913img1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>dnn_ex9912img5.jpg
    <TEXT>
    Document 39 - file: dnn_ex9912img5.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>dnn_ex9912img16.gif
    <TEXT>
    Document 40 - file: dnn_ex9912img16.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>dnn_ex9912img15.gif
    <TEXT>
    Document 41 - file: dnn_ex9912img15.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>dnn_ex9912img14.gif
    <TEXT>
    Document 42 - file: dnn_ex9912img14.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>dnn_ex999img1.gif
    <TEXT>
    Document 43 - file: dnn_ex999img1.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>dnn_ex991img4.jpg
    <TEXT>
    Document 44 - file: dnn_ex991img4.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>dnn_ex997img1.gif
    <TEXT>
    Document 45 - file: dnn_ex997img1.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>46
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>47
    <FILENAME>dnn_40f_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: dnn_40f_htm.html

    Document 47 - RAW XML: dnn_40f_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>48
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>49
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 49 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>50
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>51
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 51 - file: FilingSummary.html

    Document 51 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>54
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 54 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>55
    <FILENAME>0001654954-22-003842-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 55 - file: 0001654954-22-003842-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>