Population 2010

413,344

Population 2020

453,491

Registered Voters

210,453

Republicans

52,633

Democrat

102,177

Minor Party

9,397

No Party

46,246

Municipalities

Vallejo119,644
Fairfield110,953
Vacaville95,607
Suisun City29,045
Benicia27,780
Dixon19,144
Rio Vista8,055
Hartley2,988
Allendale1,349
Green Valley1,224
Elmira208

Superintendent of Schools

Treasurer / Tax Collector

County Commission

Supervisor District 1Erin Hannigan
Vice-Chair Supervisor District 2Monica Brown
Supervisor District 3Jim Spering
Chair Supervisor District 4John Vasquez
Supervisor District 5Mitch Mashburn

School Board

Trustee Area 1Michelle Coleman
Trustee Area 2Amy Sharp
Trustee Area 3Dana Dean
Trustee Area 4Teresa Lavell, President
Trustee Area 5Elease Cheek
Trustee Area 6Ginger Dunne, Vice President
Trustee Area 7Peggy A. Cohen-Thompson

Brief Political History

Solano County has been a Democratic stronghold in presidential and congressional elections, with Californians Richard Nixon (in 1972) and Ronald Reagan (in 1980 and 1984) being the only Republicans to win the county since 1928.

Solano County is split between California's 3rd and 5th congressional districts, represented by John Garamendi (D–Walnut Grove) and Mike Thompson (D–St. Helena), respectively.

In the California State Assembly, Solano County is split between the 4th Assembly District, represented by Democrat Cecilia Aguiar-Curry, and the 11th Assembly District, represented by Democrat Lori Wilson. In the California State Senate, it is in the 3rd Senate District, represented by Democrat Bill Dodd.

On November 4, 2008, Solano County voted 55.82% in favor of Proposition 8, which amended the California Constitution to ban same-sex marriages. It was the only Bay Area county to approve the initiative. In the 2008 presidential election that day, Barack Obama carried the county by a 28.5% margin over John McCain, a larger margin than statewide (24%).

According to the California Secretary of State, as of February 10, 2019, Solano County has 236,028 registered voters. Of those, 106,452 (45.1%) are registered Democrats, 50,006 (21.2%) are registered Republicans, and 66,558 (28.2%) have declined to state a political party. Democrats hold voter-registration advantages in all incorporated cities and towns in Solano County. However, Republicans lead in registration in the unincorporated communities of the county (40%-35%), making Solano the only county in the Bay Area where Republicans out-number Democrats in unincorporated communities. The Democrats' largest registration advantage in Solano is in the city of Vallejo, wherein there are only 8,242 Republicans (14.6%) out of 56,313 total voters compared to 33,753 Democrats (59.9%) and 12,157 voters who have declined to state a political party (21.6%).

Explore All of the States & Counties

AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY DC

Stay Up To Date with
The Patriot Impact

Privacy Policy
Terms & ConditionsServices