Mound House, Nevada is a small unincorporated community in Lyon County, Nevada on U.S. Route 50 that is situated between Nevada's capital, Carson City, and Dayton, Nevada. Its elevation is 4,974 feet (1,516 m). It is in Lyon County, one of 8 Nevada counties that allow for legalized prostitution, and is home to four brothels.Situated adjacent to Carson City, the community of Mound House lies just east of the county line and is the first community in Lyon County as one travels east on U.S.