Nicknames: Fog City, The City by the Bay (just don't call it Frisco)

Population: 815,358

Languages: English, Spanish and Chinese are the most common, though many others are spoken

Time Zone: Pacific Standard Time, 8 hours behind Greenwich Mean Time (-8 GMT)

Telephone Codes: 415, for San Francisco and Marin County; 707, for Napa and Sonoma Counties, 510, for the East Bay; 650, for the Peninsula; 408, for the South Bay; 831, for Santa Cruz, Monterey, Carmel and Big Sur