Foothill Farms is a census-designated place and unincorporated community in Sacramento County, California, USA. It is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area. The population was 33,121 at the 2010 census, up from 17,426 at the 2000 census. Foothill Farms is part of the greater North Highlands-Foothill Farms community, and comprises the zip codes 95841 and 95842.