Orange Coast College (OCC) is a public community college in Costa Mesa in Orange County, California. It was founded in 1947, with its first classes opening in the fall of 1948. It provides Associate of Art and Associate of Science degrees, certificates of achievement, and lower-division classes transferable to other colleges and universities. The college enrolls approximately 24,000 undergraduate students. In terms of population size, Orange Coast College is the third-largest college in Orange County.

Costa Mesa is a city in Orange County, California, United States. Since its incorporation in 1953, the city has grown from a semi-rural farming community of 16,840 to an urban area including part of the South Coast Plaza–John Wayne Airport edge city, one of the region's largest commercial clusters, with an economy based on retail, commerce, and light manufacturing. The city is home to the two tallest skyscrapers in Orange County. The population was 111,918 at the 2020 census.