Newbury Park is a community located mostly within the western portion of the city of Thousand Oaks in Ventura County, California. The census-designated place (CDP) of Casa Conejo is also part of Newbury Park and is an enclave within Thousand Oaks. Lying within the Conejo Valley in the northwestern part of the Greater Los Angeles Area, Newbury Park abuts the Santa Monica Mountains National Recreation Area. The ZIP code is 91320, and the community is inside area code 805. About 28,000 of Thousand Oaks’ 110,000 residents reside in Newbury Park.

Newbury Park along with Thousand Oaks proper have numerous times ranked among the safest communities in the United States. Money Magazine has ranked Newbury Park as one of the most affluent cities in the United States. It has the 11th highest per-capita income and the fourth-highest median household income in the country. As of 2013, the median household income in Newbury Park is $107,302, compared to $60,190 for California as a whole and $53,046 nationwide.