San Diego County GuideSan Diego County is the southwestern-most region of Southern California. It encompasses the city of San Diego and its large metropolitan area, which includes many smaller cities and communities. HotelsFind hotels in San Diego, Julian, Oceanside, Coronado, Hastings and more. San DiegoFrom balmy beaches with a laid-back attitude to a gleaming modern image, San Diego offers much for the tourist to enjoy. JulianJulian is in San Diego County, about one hour inland from San Diego. A mountain town situated among Cleveland National Forest, Cuyamaca Rancho State Park and Anza-Borrego Desert State Park, Julian gets the kind of seasonal weather that is rare in Southern California. OceansideOceanside is a large city on the Pacific coast of northern San Diego County, California. North CountyNorth San Diego County has a number of suburbs and several beaches popular with surfers. InlandThe Inland region of San Diego County is a large area that includes suburbs and rural towns in brushy valleys, mountains, and the desert. South BayThe South Bay region of San Diego County is bounded by Downtown San Diego to the north, the Pacific Ocean to the west, the international border with Mexico to the south, and the Otay Lakes to the east. Imperial BeachImperial Beach is a city in San Diego County in Southern California. English is the dominant language spoken in Imperial Beach and you should have no trouble making it around only speaking this language.