San Miguel is a unincorporated community in San Luis Obispo County, California, United States. As of the 2010 census, the population was 2,336. For statistical purposes, the United States Census Bureau has defined San Miguel as a census-designated place (CDP). San Miguel was founded by the Spanish in 1797, when Mission San Miguel Arcángel was established by Fermín de Lasuén. San Miguel is a tourist destination with historic architecture and vineyards, as part of the Paso Robles wine region.