Wadsworth is a census-designated place (CDP) in Washoe County, Nevada. The population was 834 at the time of the 2010 census. It is part of the Reno–Sparks Metropolitan Statistical Area and located entirely within the Pyramid Lake Indian Reservation. The town was named for General James S. Wadsworth, a Civil War general killed during the Battle of the Wilderness in 1864. It was given this name by Leland Stanford of the Central Pacific Railroad as a favor to General Irvin McDowell, whom Wadsworth had served under during the Civil War.

Washoe County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 486,492, making it Nevada's second-most populous county. Its county seat is Reno. Washoe County is included in the Reno, NV Metropolitan Statistical Area.