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is a city located in the northeastern portion of the San Francisco Bay Area in Northern California, USA (See East Bay and North Bay). It is approximately from both San Francisco and Sacramento, approximately from Oakland, and less than from Napa Valley. Fairfield was
founded in 1859 by clippership captain Robert H. Waterman, and named after his former hometown of Fairfield, Connecticut.
It is the home of Travis Air Force Base and the Jelly Belly jelly bean factory, and has a population of almost 107,000; slightly less than Vallejo, which is the Bay Area's ninth-largest city. It shares a border with its sister city, Suisun City.
Vacaville, Benicia, Napa and Vallejo. Fairfield is the county seat of Solano County.
Fairfield is located at 38°15'28" North, 122°3'15" West (38.257763, -122.054256).
According to the United States Census Bureau, the city has a total area of 38.7 square miles (99.623 km²), of which, 37.7 square miles (98.5 km²) of it is land and 0.04 square miles (3.1 km²) of it is water. The total area is 4.05% water.
The city is located within the California Coastal Ranges of the San Francisco Bay Area. The city is centered directly north of the Suisun Bay and northeast of the San Pablo Bay. Much of the Suisun Bay contains the Suisun Marsh, the largest saltwater marsh on the west coast of the United States. The Sacramento Valley lies east of Fairfield.