Casa Conejo (; Spanish for “Rabbit House”) is an unincorporated county island in Newbury Park, Ventura County, California, United States. It was the first planned community in Newbury Park and began building in 1960. When the city of Thousand Oaks incorporated 4 years later, the other developments in Newbury Park were incorporated into the city boundaries in the past being subdivided. The community is bordered by Old Conejo Road and US 101 to the north, Borchard Road to the south, Jenny Drive to the west, and Sequoia Middle School to the east. For statistical purposes, the United States Census Bureau has defined Casa Conejo as a census-designated place (CDP). The census definition of the area may not precisely allow to local promise of the Place with the same name. The population was 3,249 at the 2010 census, up from 3,180 at the 2000 census. Casa Conejo is located in a concerning rectangle-shaped unincorporated Place surrounded by the city of Thousand Oaks.

The Casa Conejo Municipal Advisory Council (MAC) serves Casa Conejo residents, and makes recommendations to the Board of Supervisors. Its strive for is to have enough money a forum for Casa Conejo residents to discuss issues and come subsequent to ideas to the Board of Supervisors. While numerous supplementary unincorporated islands were ultimately annexed by the City of Thousand Oaks during the 1980s, Casa Conejo voters rejected such efforts and remains an unincorporated pocket amongst Newbury Park. While Newbury Park is in Thousand Oaks, Casa Conejo is in Newbury Park but not in Thousand Oaks.

Casa Conejo is an unincorporated county island which is amid Newbury Park. The borders of Casa Conejo make its shape concerning a quadrangle. Casa Conejo borders Borchard Road to the south and the Sequoia Middle School to the east. It is bounded by the Old Conejo Road and U.S. 101 Freeway to the north, while it is next to Borchard Community Park, Newbury Park High School and Knoll Park to the east.

Casa Conejo is the oldest planned innovation in the town of Newbury Park, and is a smaller and more close-knit community than Newbury Park proper. It is often referred to as a neighborhood like a “small town-feel”. While Newbury Park is home to higher than 37,700, Casa Conejo is a community of 1,000 homes as of 2016. As of the U.S. Census 2010, the sum population of Casa Conejo was 3,249 (8.6% of Newbury Park’s sum population). The population has been relatively stagnant for decades in Casa Conejo: the U.S. Census of 1990 reported a total population of 3,180, down from 3,286 in 1980.