Mission Hills is a census-designated place (CDP) in Santa Barbara County, California, a short distance north of Lompoc on Highway 1. The population was 3,576 at the 2010 census, up from 3,142 at the 2000 census.GeographyMission Hills is located at .According to the United States Census Bureau, the CDP has a total area of 1.2sqmi, 99.36% of it land and 0.64% of it water.Demographics2010The 2010 United States Census reported that Mission Hills had a population of 3,576. The population density was 2,890.8 people per square mile (1,116.2/kmĀ²). The racial makeup of Mission Hills was 2,689 (75.2%) White; 91 (2.5%) African American; 74 (2.1%) Native American; 125 (3.5%) Asian; 9 (0.3%) Pacific Islander; 386 (10.8%) from other races; and 202 (5.6%) from two or more races. Hispanic or Latino of any race were 1,137 persons (31.8%).The Census reported that 3,576 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.