Ceres is a city in Stanislaus County, California. Its population was 49,302 at the 2020 U.S. Census, up from 45,417 at the 2010 U.S. Census. It is part of the Modesto metropolitan statistical area. Ceres is located in the San Joaquin Valley along State Route 99, south of Modesto and north of Turlock in Stanislaus County. Ceres is named after the Roman goddess of agriculture.