Fairfield is a city in, and the county seat of, Solano County, California, United States. It is generally considered the midpoint between the cities of San Francisco and Sacramento, approximately from the city center of both cities, approximately from the city center of Oakland, less than from Napa Valley, 17 miles from the Carquinez Bridge, and 14 miles from the Benicia Bridge. Fairfield was founded in 1856 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 headquarters of Jelly Belly. With a population of 108,321 at the 2010 census, it is slightly smaller in population than Vallejo, which is the Bay Area's ninth-largest city. It shares a border with its sister city, Suisun City. Other nearby cities include Vacaville, Benicia, and Napa.