Wisconsin Department of Natural Resources

CWD Year 2020


This table shows available CWD test results for the selected year from all counties where deer tissue samples have been collected. Results are sorted alphabetically by county name. Results for an individual year are for the CWD year, which runs from April 1st through March 31st. For example, the results for the 2020 CWD year would be April 1st, 2020 through March 31st, 2021.

See data for all years

See the data for CWD Year: 

If a county name does not appear on the list, then zero deer were sampled from this location in the selected CWD year.

Please take note of the following when interpreting data for any county where Positive test results have been obtained. CWD occurrence in any County is likely to be restricted to one or more local (isolated) areas. Reports of CWD occurrence may not imply overall prevalence in a county. Detailed information on county statistics is provided when a specific County name is selected.

Note that the DNR data reported here only includes wild deer. For information on test results for Game Farm deer and elk, please contact the Wisconsin Department of Agriculture, Trade, and Consumer Protection (phone 608-224-4872, fax 608-224-4871).


County # Sampled # Analyzed Positive for CWD
Marinette 65 51 0
Door 2 2 0
Green Lake 1 1 0
Langlade 1 1 0
Sheboygan 7 7 0
Waushara 0 0 0
Sauk 11 4 2
Grant 9 4 0
Marathon 5 5 0
Saint Croix 1 1 0
Rusk 1 0 0
Price 2 1 0
Lincoln 1 1 0
Chippewa 3 0 0
Forest 1 1 0
Kewaunee 1 1 0
Dunn 15 7 0
Dane 23 15 1
Eau Claire 8 4 0
Waukesha 3 3 0
Juneau 1 1 0
Wood 2 2 0
Columbia 5 4 0
Waupaca 3 3 0
Shawano 16 16 0
Burnett 3 3 0
Lafayette 3 1 0
Pierce 2 1 0
Brown 7 7 0
Winnebago 0 0 0
Pepin 0 0 0
Ozaukee 0 0 0
Richland 32 15 1
Crawford 6 6 0
Green 1 1 0
Marquette 5 5 0
Outagamie 2 2 0
Adams 6 6 0
Oconto 18 14 0
Unknown 1 1 0
Barron 0 0 0
Iowa 40 24 7
La Crosse 4 4 0
Vernon 3 1 0
Vilas 0 0 0
Sawyer 1 1 0
Taylor 1 0 0
Washburn 2 2 0
Bayfield 1 0 0
Manitowoc 2 2 0
Fond du Lac 8 8 0
Dodge 1 1 0
Jefferson 1 1 0
Jackson 3 0 0
Oneida 5 5 0
Portage 4 4 0
Buffalo 6 3 0
Monroe 2 2 0
Trempealeau 1 1 0
Polk 2 2 0
Totals:

For questions or comments about
Chronic Wasting Disease,
send e-mail to: Wildlife Health