Washoe Valley is a census-designated place (CDP) in Washoe County, Nevada, United States. It corresponds closely to the unincorporated community of New Washoe City. The population was 3,019 at the 2010 census. It is part of the Reno–Sparks Metropolitan Statistical Area. The CDP takes its name from the Washoe Valley, a region between Reno and Carson City centered on Washoe Lake.