Select the type of organization you'd like to see from the list:
Load map
Lake San Marcos is a small, unincorporated community located in northern San Diego County, California, United States. It has a population of approximately 4,000 residents. While it does not have any ports, shipyards, or factories producing ship parts, Lake San Marcos is situated near the coast and offers easy access to the Pacific Ocean for seafarers and boat enthusiasts.