Wilton is a census-designated place (CDP) in Sacramento County, California, United States. It is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area. The population was 5,363 at the 2010 census, up from 4,551 at the 2000 census.
Wilton is located at 38°24′34″N 121°13′27″W / 38.40944°N 121.22417°W / 38.40944; -121.22417 (38.409556, -121.224264). According to the United States Census Bureau, the CDP has a total area of 29.0 square miles (75.1 km²), all of it land.
Historically the Wilton vicinity has been a locale of considerable haying and pasture usage; the depth to groundwater is typically about 150 to 175 feet (46 to 53 meters).