Contra Costa County, CA elected officials: supervisors, sheriff, school board and cities

Who holds every elected county, school board, city and special-district office in Contra Costa County: 8 seats on 4 elected bodies. 3 seats were on the November 3, 2026 ballot; they update once the county certifies its results.

Board of Supervisors

Contra Costa County Board of Supervisors

Each member is elected by the voters of their district.

OfficeWho holds it now
Supervisor, District 1John Gioia source
Supervisor, District 2Candace Andersen source
Supervisor, District 3Diane Burgis source
Supervisor, District 4Kent Carlson source
Supervisor, District 5Shanelle Scales-Preston source

Official website

County officers

OfficeWho holds it nowNext term
AssessorGus Kramer sourceOn the Nov 3, 2026 ballot: count not certified yet
District AttorneyDiana Becton sourceOn the Nov 3, 2026 ballot: count not certified yet
Sheriff-CoronerDavid O. Livingston sourceOn the Nov 3, 2026 ballot: count not certified yet

How many local governments Contra Costa County has

The Census Bureau's 2022 Census of Governments counts 102 local governments in Contra Costa County. This page lists the ones whose offices are elected.

Kind of governmentCensus count (2022)Listed on this page
County government11
Cities, towns, villages and townships190
School districts (school boards)190
Special districts (elected boards)630

Census Bureau, 2022 Census of Governments: Government Units Listing (census.gov).

About these counts

The Census Bureau counts every independent local government once, in the county it assigns it to: the one it mostly serves or where it's based. A city or district that crosses county lines is counted in only one county, so it may be listed on this page but counted elsewhere, or the other way around. Many special districts, such as housing authorities, have appointed boards, and some places have more than one elected body, so the two columns measure different things. School systems run by a county, city or the state aren't counted as separate governments (1 in Contra Costa County), though their boards may be listed here; in some states the Bureau counts community or state colleges as school districts. The counts are as of 2022.

Who lives in Contra Costa County

1,165,012people
40.5median ageU.S.: 38.9
$127,229 household incomeU.S.: $80,734
8.4%below the U.S.: 12.5%
45.2%of adults 25+ with a bachelor's degreeU.S.: 35.7%
$866,800median home valueU.S.: $332,700
6.5%unemployed (of the labor force)U.S.: 5.2%
26.6%born outside the U.S.U.S.: 14.1%
4.2%of adults are veteransU.S.: 6.2%
4.6%U.S.: 8.4%
56.1%of renting households pay of income on rentU.S.: 51.1%
36.7%of homeowners with a mortgage pay of income on housing costsU.S.: 28.1%

Race and Hispanic origin: Hispanic or Latino 27.6% · White 38.1% · Black 7.9% · Asian 18.6% · Other or more than one race 7.7% (Hispanic or Latino people can be of any race; the other groups are non-Hispanic.)

Census Bureau, 2020–2024 5-year estimates (data.census.gov).

About these figures

The American Community Survey asks about 3.5 million households a year about who lives there, their work, income, schooling and housing. The 5-year estimates pool 2020–2024 answers so that every county and district has enough of them. They're estimates with a (larger for smaller places), and they're different from the once-a-decade census count. "Median" means half are above and half below. Household income is before taxes and includes everyone in the household. The unemployment share here is the survey's five-year average, so it differs from the monthly rate in the BLS jobs report. Race and Hispanic origin are as people describe themselves.

Health insurance means any coverage, private or public (such as Medicaid or Medicare), when people answered; the share is of everyone except people on active military duty and people living in institutions such as prisons and nursing homes. The housing shares are of renting households, and of homeowners with a mortgage, for whom the Census Bureau can compute them (households with no income, or renters who pay no cash rent, are left out). Rent here is gross rent, rent plus utilities; owner costs include the mortgage, property taxes, insurance, utilities and fees.

Jobs in Contra Costa County

4.8%September 2026, preliminary. A year earlier: 5.0%. California: 5.1%.
27,772people unemployedSeptember 2026, preliminary.
549,686people employedSeptember 2026, preliminary. Counted where they live, not where they work.
577,458in the September 2026, preliminary.
Unemployment rate, yearly average, Contra Costa County 0.0%2.3%4.6%6.9%9.1% 20162018202020222024

Yearly average unemployment rate, 2016–2025.

Every month, last two years
MonthRateUnemployedEmployedLabor force
September 2026 (preliminary)4.8%27,772549,686577,458
August 20265.0%28,760544,973573,733
July 20264.8%27,503544,682572,185
June 20264.6%26,024544,470570,494
May 20264.0%22,741549,068571,809
April 20264.2%24,328550,373574,701
March 20264.4%25,390554,358579,748
February 20264.6%26,929555,132582,061
January 20264.8%27,456549,265576,721
December 20254.5%26,263558,508584,771
November 20254.9%28,689559,228587,917
October 2025not collected (2025 federal shutdown)
September 20255.0%29,586560,171589,757
August 20255.2%30,675556,144586,819
July 20255.2%30,331558,488588,819
June 20254.9%28,735554,851583,586
May 20254.3%25,006557,376582,382
April 20254.4%25,611557,431583,042
March 20254.6%26,977562,780589,757
February 20254.7%27,589560,007587,596
January 20254.8%27,897557,386585,283
December 20244.4%25,603558,309583,912
November 20244.7%27,273557,666584,939
October 20244.7%27,193557,196584,389
Yearly averages
YearRateUnemployedEmployedLabor force
2025 (11 months)4.8%27,942558,397586,339
20244.5%26,265558,280584,545
20233.9%22,589559,531582,120
20223.4%19,713556,292576,005
20216.1%34,836533,969568,805
20208.7%49,083515,787564,870
20193.0%17,568564,440582,008
20183.1%18,127563,252581,379
20173.7%21,700557,360579,060
20164.4%25,018548,418573,436

Bureau of Labor Statistics, Local Area Unemployment Statistics, : BLS publishes county figures only that way, so they rise and fall with the seasons; compare a month with the same month a year earlier rather than with the month before. California's figure above is on the same basis; seasonally adjusted, as in BLS's monthly state release, it was 5.1% in September 2026. The latest month is preliminary and is revised the next month, and BLS revises earlier years each spring. People are counted where they live. October 2025 wasn't collected during the 2025 federal government shutdown, so 2025's yearly average covers 11 months.

Crime reported in Contra Costa County

351.4 per 100,0002025. California: 432.7.
1,669.2 per 100,0002025. California: 1,792.2.
30murders2025, 4,120 violent crimes in all.
Earlier years
YearViolentRatePropertyRate
20254,120351.419,5711,669.2
20244,431378.624,3662,082.0
20234,777412.825,0382,163.4
20224,724407.723,4082,020.4
20203,828331.822,8651,982.0
20194,076353.427,2792,365.4
20183,820331.426,2632,278.5
20173,741325.828,1302,450.0
20163,796334.627,1092,389.8
By police agency (21)
AgencyYearViolentPropertyPeople served
Contra Costa County Sheriff's Office20254281,567169,989
Concord Police Department20255193,394123,703
Antioch Police Department20259002,895119,234
Richmond Police Department20259362,349115,149
San Ramon Police Department20257982585,810
Pittsburg Police Department20253401,18977,328
Walnut Creek Police Department20251481,70370,970
Brentwood Police Department20251331,04466,753
Oakley Police Department20256735748,125
Danville Police Department20252418543,372
Martinez Police Department20259440636,962
Pleasant Hill Police Department2025711,17334,065
San Pablo Police Department202512463231,429
Hercules Police Department20254411926,595
El Cerrito Police Department202511272026,528
Lafayette Police Department20251427525,368
Orinda Police Department20251515519,588
Pinole Police Department20255340618,579
Moraga Police Department2024158016,438
Clayton Police Department202547710,901
Kensington Police Department20255615,397

Crimes to the county's city and county police agencies (FBI Uniform Crime Reporting, Return A), per 100,000 people they serve. Years with incomplete reporting are left out. Crime in California · the U.S.

Quick answers

Who is the Contra Costa County Assessor?
Gus Kramer is the Assessor of Contra Costa County, California. The seat was on the November 3, 2026 ballot; the count isn't certified yet.
Who is the Contra Costa County District Attorney?
Diana Becton is the District Attorney of Contra Costa County, California. The seat was on the November 3, 2026 ballot; the count isn't certified yet.
Who is the Contra Costa County Sheriff-Coroner?
David O. Livingston is the Sheriff-Coroner of Contra Costa County, California. The seat was on the November 3, 2026 ballot; the count isn't certified yet.
Who are the Contra Costa County commissioners?
John Gioia (Supervisor, District 1); Candace Andersen (Supervisor, District 2); Diane Burgis (Supervisor, District 3); Kent Carlson (Supervisor, District 4); Shanelle Scales-Preston (Supervisor, District 5).
What is the population of Contra Costa County?
About 1,165,012 people, with a median age of 40.5; the median household income is $127,229 and 8.4% live below the poverty line (Census Bureau, American Community Survey 2020–2024 5-year estimates).
What is the unemployment rate in Contra Costa County?
4.8% in September 2026 (preliminary): 27,772 people unemployed in a labor force of 577,458, against 5.0% a year earlier (Bureau of Labor Statistics, Local Area Unemployment Statistics, not seasonally adjusted).
How many local governments are there in Contra Costa County?
102 in the Census Bureau's 2022 Census of Governments: 1 county, 19 municipal, 19 school district and 63 special district governments.

Officeholders as of November 6, 2026, from the Secretary of State's California Roster; each name links to its source. Officials change between elections (appointments, resignations), and the body's own website is the authority. Party is shown only for offices elected on a partisan ballot.

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