About Knightsen CDP, California
Knightsen is a census-designated place (CDP) in Contra Costa County, California, United States. The population was 2,067 at the 2010 census.
Knightsen is located at 38°0′21″N 121°34′57″W / 38.006194°N 121.582528°W / 38.006194; -121.582528.
According to the United States Census Bureau, the CDP has a total area of 5.5 square miles (14 km2), all of it land.”