Solano County Flag

Solano County

State:
California
County Seat:
Fairfield

Solano County's estimated 2025 population is 459,142 with a growth rate of 0.89% in the past year according to the most recent United States census data. Solano County is the 19th largest county in California. The 2010 population was 413,963 and has seen a growth of 10.91% since that time.

459,142
Total Population
559
Population Density (mi²)
19
Population Rank (State)
4K 0.89%
Annual Population Growth

Solano County Population

Demographics

Economics and Income Statistics

Sources

  1. City and Town Population Totals: 2020-2024
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)