The North Bay is a subregion of the
San Francisco Bay Area, in
California,
United States. It is by far the least populous and least urbanized part of the Bay Area. It consists of
Marin,
Sonoma,
Napa, and
Solano counties. It is, unusually for a major metropolitan area, still highly agricultural in character. Most famously, the California wine country (consisting of the neighboring Sonoma and Napa Valleys) is located in the North Bay. Historically, it is also a dairy farming region. Although the growth of the wine industry has slowly edged out the dairy industry, it is still common to see cows grazing on the hillsides of Sonoma County in particular. Solano County is the notable exception to this pattern, with
exurban development occurring at a rapid pace on former pastureland surrounding
Vacaville and
Fairfield. The growth of these two cities is largely a function of their proximity to both San Francisco and
Sacramento, although some North Bay residents commute all the way to
San Mateo or
Santa Clara counties.
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