Solano County, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 19th-largest in California
The population of Solano County, California is 450,824 as of the 2023 American Community Survey, making it the 19th-largest county in California. The median household income is $99,994, the median home value is $589,600, and the median age is 39.1.
The population of Solano County has grown 9.9% since 2010 (413,963 → 455,101), a +0.68% annualized rate.
450,824
Population
+0.68%
Annual growth
549
People / sq mi
$99,994
Median Income
$589,600
Median Home Value
Solano County covers 822 sq mi of land at 548.6 people per square mile.
About Solano County, CA
In Solano County, home values do the distinguishing — a median of $589,600. Solano County is a county in California with a population of 450,824. It ranks #19 among counties in California by population.
Earnings sit at the high end: a median household income of $99,994, above the US median of $78,538. About 7.1% of residents live below the federal poverty level, below the national 12.4%. Real estate commands a premium here — a median home value of $589,600, with typical rent around $2,088.
About 28.4% of adults 25 and older have a bachelor’s degree, below the 35.0% national figure. Remote work is on the higher side at 10.9%, below the national 14.0%, and the average commute runs about 32 minutes each way.
High housing values reframe the income picture in Solano County — even solid earnings stretch less against home prices and rents at this level.
Solano County Population History (2010-2024)
The county of Solano County had a population of 413,963 in 2010 and 455,101 in 2024, a 9.9% growth over 14 years. The peak was 455,101 in 2024. Average annual growth rate: 0.68%.
455,101
Population (2024)
413,963
Population (2010)
455,101
Peak (2024)
0.68%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 413,963 |
| 2011 | 416,325 |
| 2012 | 419,645 |
| 2013 | 423,634 |
| 2014 | 428,971 |
| 2015 | 433,378 |
| 2016 | 438,834 |
| 2017 | 443,554 |
| 2018 | 445,931 |
| 2019 | 447,434 |
| 2020 | 452,887 |
| 2021 | 450,819 |
| 2022 | 449,724 |
| 2023 | 451,060 |
| 2024 | 455,101 |
Race & Ethnicity
| White | 42.7% |
| Black or African American | 12.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.8% |
| Two or More Races | 0.1% |
Age & Sex
39.1
Median Age
50.1%
Female
49.9%
Male
16.9%
Age 65+
Age Distribution
Children (under 15): 18.4% · Seniors (65+): 16.9%
Income & Poverty
| Median household income | $99,994+$3,660 vs state |
| Mean household income | $124,288 |
| Per-capita income | $44,139 |
| Poverty rate | 7.1%-1.3% vs state |
| Unemployment rate | 3.6% |
| Employment-to-population | 57.6% |
Top Industries by Employment
The largest employment sector in Solano County is professional & business services, accounting for 22.7% of workers.
How residents commute
1.9%
Drive alone
1.3%
Carpool
74.2%
Public transit
10.9%
Work from home
31.8 min
Avg commute
Housing
$589,600$-105,800 vs state
Median home value
$2,088
Median rent
63.2%
Homeownership rate
163,455
Total housing units
95.3%
Occupied
4.7%
Vacant
36.8%
Renter-occupied
Social & access
95.1%
With health insurance
96.9%
With broadband internet
17.4%
Foreign-born
8.3%
Veterans (18+)
12.8%
With a disability
69.3%
Speak language other than English at home
Education
88.9%
High School+
28.4%
Bachelor's+
Largest cities in California
Other counties in California
Part of California
Metro areas in California
County rankings
Common questions about Solano County, CA
Frequently Asked Questions
Solano County, California has a population of 450,824 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 19th-largest county in California. Population density is 549 people per square mile.
The population of Solano County has grown 9.9% since 2010 (413,963 → 455,101), a +0.68% annualized rate.
The median household income in Solano County, California is $99,994, with mean (average) household income of $124,288 and per-capita income of $44,139. 7.1% of residents live below the federal poverty level.
In Solano County, the largest racial and ethnic groups are White (42.7%), Black or African American (12.9%), Hispanic or Latino (2.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Solano County, California is 39.1 years. Residents are 50.1% female and 49.9% male.
The median home value in Solano County is $589,600 and median monthly rent is $2,088. 63.2% of occupied housing units are owner-occupied. The county has 163,455 total housing units, 4.7% of which are vacant.
The largest employment sector in Solano County, California is professional, scientific, and management services, employing 22.7% of workers. The unemployment rate is 3.6%.
Los Angeles is among the largest cities associated with Solano County, California, with a population of 3,857,897.
Solano County, CA Climate
Solano County, CA has an average annual temperature of 15.9°C (61°F) and receives about 563 mm of precipitation per year. The warmest month is July and the coldest is December. Figures are 1970–2000 climate normals.
15.9°C
Avg Temp
563
Precip (mm/yr)
Jul
Hottest Month
Dec
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 8° / 47° | 129 mm |
| February | 11° / 51° | 109 mm |
| March | 13° / 55° | 81 mm |
| April | 15° / 59° | 27 mm |
| May | 18° / 65° | 13 mm |
| June | 21° / 70° | 3 mm |
| July | 23° / 73° | 1 mm |
| August | 23° / 73° | 1 mm |
| September | 22° / 71° | 7 mm |
| October | 18° / 64° | 29 mm |
| November | 12° / 54° | 78 mm |
| December | 8° / 47° | 85 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Solano County, CA
The most comfortable months to visit Solano County, CA are typically June, September and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 33°C high). The coldest is December (near 3°C low). January is usually the wettest month.
Where to stay near Solano County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.