It is a part of the San Francisco Bay Area. The population was 44,722 at the 2000 census.
San Ramon is a suburb of San Francisco, Oakland, and Silicon Valley. As the location of the former headquarters of the company formerly known as Pacific Bell (later SBC, now AT&T), it is the home of Dilbert (Scott Adams worked there before creating the Dilbert comic strip). It is also home to the headquarters of Chevron Corporation, 24-Hour Fitness, Diablo Valley College San Ramon Valley Center, and two main public high schools:California High School and Dougherty Valley High School.
The development of Bishop Ranch Business Park in 1982, transformed San Ramon into a significant regional employment center. With the development of major new employment centers, employees are attracted from such far away distances as Sacramento and San Joaquin Counties.
The Bishop Ranch Business Park consists of 580 acres (2.3 km2) of land with 5,900,000 square feet (548,000 m2) of office space. The office park currently is home to approximately 200 companies including such Fortune 500 companies as AT&T (formerly SBC), Chevron, Toyota, and United Parcel Service. San Ramon is an expanding city and it is expected that over 16,000 jobs will be added within the next 15 years. This represents a 58% increase over the current 27,643 jobs in San Ramon.