Casa Conejo is a census-designated place (CDP) in Ventura County, California, United States. It was the first planned community in Newbury Park, built between 1960 and 1965. The community is bordered by Old Conejo Road and the US 101 to the North, Borchard Road to the South, Jenny Dr. to the West, and Sequoia Middle School to the East. The population was 3,249 at the 2010 census, up from 3,180 at the 2000 census. Casa Conejo is located in a roughly square-shaped unincorporated area outside the borders of Thousand Oaks.