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Chronic Wasting Disease distribution in the United States by state and county (ver. 3.0, June 2025)

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2025-06-30T00:00:00Z
Chronic Wasting Disease (CWD) is a fatal, contagious, neuro-degenerative disease affecting multiple members of the Family Cervidae. First detected in 1967, the disease has, as of April 2025, been documented in free-ranging and/or captive cervid populations in 36 states, five Canadian provinces, South Korea, Norway, Sweden, and Finland. The data sheets provided here contain information on the known, available, documented distribution of CWD in the United States that is current as of April 2025. “CWD distribution by year maps.zip” contains maps showing chronic wasting disease distribution in North America prior to 2000 and yearly from 2004 to 2024 as documented at the end of each year.

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