Chronic Wasting Disease distribution in the United States by state and county (ver. 4.0, August 2026)

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 June 2026, been documented in free-ranging and/or captive cervid populations in 37 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 June 2026. “CWD distribution by year maps.zip” contains maps showing chronic wasting disease distribution in North America prior to 2000 and yearly from 2004 to 2025 as documented at the end of each year.