Wadsworth is a census-designated place 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 t…Wadsworth is a census-designated place 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.