and the San Francisco Bay Area are the nation's second- and fifth-most populous urban regions, with 18.7

San Francisco, officially the City and County of San Francisco and colloquially known as SF, San

City and San Marino. Italy has a territorial exclave in Switzerland (Campione) and a maritime

The San Francisco 49ers are a professional American football team based in the San Francisco Bay

The San Francisco Giants are an American professional baseball team based in San Francisco

. A major West Coast port city, Oakland is the largest city in the East Bay region of the San Francisco Bay

rock. Its roots can be traced to earlier punk scenes in San Francisco and Southern California which

The New York Giants are a professional American football team based in the New York metropolitan

, San Francisco, and Mexico City. Vancouver is one of the most ethnically and linguistically diverse

Francisco Bay, San Jose covers an area of 179.97 square miles (466.1 km2). San Jose is the county seat