Fort Washakie is a census-designated place (CDP) in Fremont County, Wyoming, United States, within the Wind River Indian Reservation and along U.S. Route 287. The population was 1,759 at the 2010 census. The headquarters for the Eastern Shoshone Tribe is located in Fort Washakie, as well as the Bureau of Indian Affairs agency for the Wind River Indian Reservation.

Fremont County is a county in the U.S. state of Wyoming. As of the 2020 United States census, the population was 39,234, making it the fifth-most populous county in Wyoming. Its county seat is Lander. The county was founded in 1884 and is named for John C. Frémont, a general, explorer, and politician. It is roughly the size of the state of Vermont.