San Diego

Port, city, and important U.S. military and naval base, seat (1850) of San Diego county, southern California, U.S. It lies along the Pacific Ocean at San Diego Bay (there bridged to Coronado). Sighted in 1542 and named San Miguel by Juan Rodr�guez Cabrillo, the area was renamed San Diego de Alcal� de Henares in 1602 by Sebasti�n Vizca�no. Gaspar de Portol� founded a presidio (military post) there