• county
  • FIPS 06095
  • Largest town: Vallejo

Solano County, California

Solano County had 455,101 residents in the Census Vintage 2024 estimate, on 821.7 square miles of land. It ranks 19th of 58 in California by population and 46th by land area.

Population
455,101
#19 of 58 in California · #162 in US
Area
821.7 sq mi
#46 of 58 in California · #1,031 in US
Density
554 / sq mi
#12 of 58 in California · #259 in US
Median household income
$99,117
#16 of 58 in California · #147 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Solano County within California. Pin: Sacramento.

Measure from here

Tools and pages that start from Solano County

Solano County population, land area and income

Solano County had 455,101 residents in the Census Vintage 2024 estimate, on 821.7 square miles of land. It ranks 19th of 58 in California by population and 46th by land area. That works out to 553.8 people per square mile, 5.8 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in California has 187,274 residents, so Solano County is 2.4 times that size.

Its SAIPE 2023 median household income of $99,117 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

455,101

3144th1st

162nd of 3,144 (US)

Land area

822 sq mi

3144th1st

1031st of 3,144 (US)

Density

553.8 / sq mi

3144th1st

259th of 3,144 (US)

Median household income

$99,117

3143rd1st

147th of 3,143 (US)

Rank within California (58)

Population

455,101

58th1st

19th of 58 (CA)

Land area

822 sq mi

58th1st

46th of 58 (CA)

Density

553.8 / sq mi

58th1st

12th of 58 (CA)

Median household income

$99,117

58th1st

16th of 58 (CA)

How Solano County's population changed since 2020

Solano County gained 2,214 residents between the July 2020 and July 2024 estimates, a rise of 0.5%. That ranks 22nd of 58 in California for growth. The median California county changed by -0.6%, and the state as a whole by -0.2%.

Since the April 2020 estimates base, Solano County recorded 19,937 births and 16,570 deaths, a natural change of +3,367. Net international migration added +8,085 and net domestic migration, people moving to or from other US counties, came to -9,898. The largest single component was domestic migration, which removed 9,898 people.

452.9k2020450.8k2021449.7k2022451.1k2023455.1k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
19,937
Deaths
16,570
Net international migration
+8,085
Net domestic migration
-9,898
Change, July 2023 to July 2024
+4,041

Where Solano County is

The Census internal point of Solano County is at 38.267200, -121.939600. It sits in UTM zone 10N. The map shades California's 58 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Solano County outlined. Dots are towns of 1,000+ people with residents in it.

Los Angeles County: -2.4%Kings County: +1.4%Sierra County: -3.6%Riverside County: +4.3%Santa Barbara County: -0.8%San Bernardino County: +1.4%Nevada County: -0.1%Santa Clara County: +0.1%Yuba County: +6.7%Fresno County: +1.4%Plumas County: -4.7%Monterey County: -1.0%Amador County: +3.6%Alameda County: -1.9%Tulare County: +2.0%San Joaquin County: +4.5%Alpine County: -6.8%Siskiyou County: -3.4%Butte County: -0.9%Kern County: +1.8%San Diego County: -0.1%Sacramento County: +1.5%Ventura County: -1.0%Yolo County: +3.4%Lake County: -0.6%Napa County: -3.4%Tehama County: -1.9%San Francisco County: -5.4%El Dorado County: +0.8%Calaveras County: +2.5%Inyo County: -2.7%Shasta County: -0.6%Lassen County: -12.3%San Luis Obispo County: -0.0%Mariposa County: -0.5%Trinity County: -2.8%Contra Costa County: +0.6%Mendocino County: -2.4%Imperial County: +1.1%Santa Cruz County: -3.4%Placer County: +6.9%Orange County: -0.5%San Benito County: +7.2%Marin County: -1.9%San Mateo County: -2.6%Colusa County: +0.9%Del Norte County: -2.2%Solano County: +0.5%Glenn County: -2.0%Tuolumne County: -2.7%Sonoma County: -0.6%Humboldt County: -2.9%Mono County: -1.8%Stanislaus County: +0.6%Merced County: +4.9%Sutter County: -0.9%Madera County: +5.8%Modoc County: -2.1%
Change 2020 to 2024
  1. < -2.7%
  2. < -1.0%
  3. < -0.0%
  4. < +1.5%
  5. ≥ +1.5%
no data

Orange pin: Solano County internal point. Dark pin: Sacramento.

Internal point

Decimal
38.267200, -121.939600
DMS
38°16'1.92"N 121°56'22.56"W
UTM
10N 592762.7E 4235993.8N
Geohash
9qc39nq69
Plus code
84CW7386+V5

Towns in Solano County

7 incorporated places of 1,000+ people have residents in Solano County, 436,750 people together, or 96% of the county. Each figure counts only the part of the town inside Solano County; towns marked "part" extend into another county. The largest is Vallejo with 123,475.

  1. 01Vallejo123,475
  2. 02Fairfield122,646
  3. 03Vacaville103,994
  4. 04Suisun City29,614
  5. 05Benicia26,477
  6. 06Dixon20,296
  7. 07Rio Vista10,248
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Solano County

The Census 2024 county adjacency file lists 6 neighbors for Solano County. The most populous is Sacramento County, CA, with 1,611,231 residents. Distances run between Census internal points in a straight line.

Distance to Sacramento and the nearest big city

Sacramento is 32.2 miles NE of Solano County's internal point in a straight line. The nearest place of 100,000 or more is Fairfield, CA (population 122,646), 5.0 miles away. The nearest place of 10,000 or more is Suisun City, CA (population 29,614), 4.0 miles away.

Solano County FIPS code

The FIPS code of Solano County is 06095: state code 06 for California plus county code 095. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $99,117.

Questions people ask

What is the population of Solano County, California?

The Census Vintage 2024 estimate for July 1, 2024 is 455,101. That is up 2,214 people (0.5%) from the July 2020 estimate of 452,887.

What is the FIPS code of Solano County?

06095. The first two digits (06) are California; the last three (095) identify the county.

What is the largest town in Solano County?

Vallejo, with 123,475 residents inside Solano County in 2024.

Which counties border Solano County?

6 county-equivalents border it in the Census 2024 adjacency file: Sacramento County, CA; Contra Costa County, CA; Sonoma County, CA; Marin County, CA; Yolo County, CA; Napa County, CA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.