San Francisco Bay City is a metropolitan area located in the northern part of California. It is composed of four cities: Fremont, Alameda, Oakland, and Palo Alto. Fremont is a city in Alameda County, located east of San Jose and south of Oakland. Alameda is an island city located in the San Francisco Bay, east of Oakland. Oakland is the largest city in the Bay Area and is located east of San Francisco. Palo Alto is a city in Santa Clara County, located south of San Francisco. All four cities are part of the San Francisco Bay City metropolitan area.