Diamond Springs (formerly, Diamond Spring and Diamond) is a census-designated place (CDP) in El Dorado County, California, United States. It is part of the Sacramento?Arden-Arcade?Roseville Metropolitan Statistical Area. The population was 11,037 at the 2010 census, up from 4,888 at the 2000 census. The town is registered as California Historical Landmark number 487. It lies at an elevation of 1791 feet (546 m).