where is oak park, ca
Oak Park, CA. Sponsored Topics. Oak Park is a census-designated place located in the Simi Hills, in Ventura County, California. As of the 2010 census, Oak Park had a population of 14,266, up from 14,225 at the 2000 census. It is located in the Conejo Valley, north from Malibu and Agoura Hills and is a part of Ventura County.