The San Francisco Bay Area, also known as the Bay Area, is a metropolitan area that goes around the San Francisco Bay in Northern California. It includes the cities of San Francisco, San José, and Oakland, and their many suburbs. It also includes the smaller urban and rural areas of the North Bay. Over seven million people live in the San Francisco Bay Area.[1] The San Francisco Bay Area is the 43rd largest metropolitan area in the world in population.
The Bay Area includes cities, towns, military bases, airports, and related regional, state, and national parks. In general, it has a Mediterranean climate, but the climates are quite different in different places. Inland areas are usually hotter than areas near the bay or ocean. San Francisco is known for its cold weather and fog.
San José is the largest city in the Bay Area since 1990 and the tenth largest city in America. But for most of its history, San Francisco was the city with the most people. San Francisco is still the city people pay the most attention to, and it is the major cultural center in the region.
Bay Area Rapid Transit connects some parts of the Bay Area. Caltrain connects cities in the San Francisco Peninsula and Santa Clara Valley.