Foothill Ranch is a master planned community in Orange County, California, United States. The population was 10,899 at the 2000 census. Foothill Ranch was incorporated into the city of Lake Forest, California, in 2000. Prior to that, it was a census-designated place. Foothill Ranch is notable for companies such as Oakley, Inc., Nike, Kaiser Aluminum, Kawasaki, Hampton Products/Brinks, TAE Technologies, Viking Technology, Image Options and ProBoards. It is also the home of Saddleback Church.