Expanding Distribution of Chronic Wasting Disease
Chronic wasting disease (CWD) has been detected in 37 US states and five Canadian provinces in free-ranging cervids and/or captive cervid facilities.
Distribution of Chronic Wasting Disease in North America (Updated)
Click the image to download the high resolution map.
Data on CWD positive counties and states in the United States and yearly distribution maps are released annually at https://doi.org/10.5066/P9HQKKFO.
The June 2026 update to the North American CWD Distribution Map included a change from displaying positive detections by county to positive detections by wildlife management unit (combined or deer units) for North Dakota, Wyoming, Idaho, Montana, and Colorado. This change is to better align with the way these states publicly report positive CWD detections.
| State | Free-ranging cervids | Captive cervids |
|---|---|---|
| Alabama | Y | |
| Arkansas | Y | |
| California | Y | |
| Colorado | Y | Y |
| Florida | Y | |
| Delaware | Y | |
| Georgia | Y | |
| Idaho | Y | Y |
| Illinois | Y | Y |
| Indiana | Y | |
| Iowa | Y | Y |
| Kansas | Y | Y |
| Kentucky | Y | Y |
| Louisiana | Y | Y |
| Maryland | Y | |
| Michigan | Y | Y |
| Minnesota | Y | Y |
| Mississippi | Y | Y |
| Missouri | Y | Y |
| Montana | Y | Y |
| Nebraska | Y | Y |
| New Mexico | Y | |
| New York | Y | Y |
| North Carolina | Y | |
| North Dakota | Y | |
| Ohio | Y | Y |
| Oklahoma | Y | Y |
| Pennsylvania | Y | Y |
| South Dakota | Y | Y |
| Tennessee | Y | |
| Texas | Y | Y |
| Utah | Y | Y |
| Virginia | Y | |
| Washington | Y | |
| West Virginia | Y | Y |
| Wisconsin | Y | Y |
| Wyoming | Y |
| Province | Free-ranging cervids | Captive Cervids |
|---|---|---|
| Alberta | Y | Y |
| British Columbia | Y | |
| Manitoba | Y | |
| Quebec | Y | |
| Saskatchewan | Y | Y |
| Country | Free-ranging cervids | Captive cervids |
|---|---|---|
| Canada | Y | Y |
| Finland | Y | |
| Norway | Y | |
| South Korea | Y | |
| Sweden | Y | |
| United States | Y | Y |
Chronic wasting disease (CWD) has been detected in 37 US states and five Canadian provinces in free-ranging cervids and/or captive cervid facilities.
Distribution of Chronic Wasting Disease in North America (Updated)
Click the image to download the high resolution map.
Data on CWD positive counties and states in the United States and yearly distribution maps are released annually at https://doi.org/10.5066/P9HQKKFO.
The June 2026 update to the North American CWD Distribution Map included a change from displaying positive detections by county to positive detections by wildlife management unit (combined or deer units) for North Dakota, Wyoming, Idaho, Montana, and Colorado. This change is to better align with the way these states publicly report positive CWD detections.
| State | Free-ranging cervids | Captive cervids |
|---|---|---|
| Alabama | Y | |
| Arkansas | Y | |
| California | Y | |
| Colorado | Y | Y |
| Florida | Y | |
| Delaware | Y | |
| Georgia | Y | |
| Idaho | Y | Y |
| Illinois | Y | Y |
| Indiana | Y | |
| Iowa | Y | Y |
| Kansas | Y | Y |
| Kentucky | Y | Y |
| Louisiana | Y | Y |
| Maryland | Y | |
| Michigan | Y | Y |
| Minnesota | Y | Y |
| Mississippi | Y | Y |
| Missouri | Y | Y |
| Montana | Y | Y |
| Nebraska | Y | Y |
| New Mexico | Y | |
| New York | Y | Y |
| North Carolina | Y | |
| North Dakota | Y | |
| Ohio | Y | Y |
| Oklahoma | Y | Y |
| Pennsylvania | Y | Y |
| South Dakota | Y | Y |
| Tennessee | Y | |
| Texas | Y | Y |
| Utah | Y | Y |
| Virginia | Y | |
| Washington | Y | |
| West Virginia | Y | Y |
| Wisconsin | Y | Y |
| Wyoming | Y |
| Province | Free-ranging cervids | Captive Cervids |
|---|---|---|
| Alberta | Y | Y |
| British Columbia | Y | |
| Manitoba | Y | |
| Quebec | Y | |
| Saskatchewan | Y | Y |
| Country | Free-ranging cervids | Captive cervids |
|---|---|---|
| Canada | Y | Y |
| Finland | Y | |
| Norway | Y | |
| South Korea | Y | |
| Sweden | Y | |
| United States | Y | Y |