Costa Mesa is a suburban middle class city in Orange County, California, United States. The population was 108,724 at the 2000 census. Since its incorporation in 1953, the city has grown from a semi-rural farming community of 16,840 to a suburban city with an economy based on retail, commerce and light manufacturing. Costa Mesa apartments for rent comparison page shows most up to date rent information on Costa Mesa apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.