Solano County, California

Solano County is located where the San Francisco Bay Area meets California’s Central Valley. Vallejo is one of its largest cities and is home to a major Six Flags amusement park, while Fairfield is known for the Jelly Belly factory.

With a population of about 450,000 people, the county includes thriving communities such as Vallejo, Vacaville, Fairfield, and Benicia. Travis Air Force Base is also an important presence in the area.

Interstate 80 runs through Solano County, making it a key transportation route between San Francisco and Sacramento. The county has a diverse character, combining suburban communities with agricultural areas and open farmland.

CategoryDetails
County NameSolano County
County SeatFairfield
PopulationApproximately 450,000
Cities, Towns, and CommunitiesVallejo, Vacaville, Dixon, Benicia, Suisun City, Rio Vista
Interstates and HighwaysInterstate 80, Interstate 680, State Route 12
FIPS Code06-095
Total Area (Land and Water)906 square miles (Land: 802 sq mi, Water: 104 sq mi)
Adjacent Counties (and Direction) Contra Costa County (South), Sonoma County (West), Napa County (West), Yolo County (North), Sacramento County (East)
Time ZonePacific Standard Time (PST)
StateCalifornia
Coordinates38.2494° N, 121.8939° W
EtymologyNamed after Chief Solano of the Suisunes
Major LandmarksLake Solano, Travis Air Force Base, Suisun Marsh, Benicia State Historic Park

PHYSICAL MAP

Solano County Topographic Map

This topographic map highlights Solano County’s transition from delta wetlands to inland hills. The terrain includes marshlands, agricultural plains, and the western edge of California’s Central Valley, with gradual changes in elevation across the county.

SATELLITE IMAGERY

Solano County Satellite Map

This satellite map reveals the distinctive wetlands around Suisun Bay, along with agricultural fields and expanding urban areas. Major transportation corridors connect the county’s communities and create visible patterns across the landscape.

OUTLINE MAP

Solano County Blank Map

This blank map outlines Solano County’s irregular shape along the northeastern San Francisco Bay region. The southern boundary follows Suisun Bay, while the northern portion extends toward the Central Valley.

California County Map

Printable California county map showing county boundaries and locations

Ever wonder how California’s 58 counties are organized? Our California county map lays them all out, from the Pacific Coast to the vast desert regions. Explore the map to find the counties you know—and perhaps discover a few you don’t.

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