California State Senate District 9

State Legislative District Profile (Upper Chamber)

Overview

District ID
ca-sd-009
State
California
Chamber
Upper chamber (state senate)
District Code
009
Land Area
600.8 sq mi
Water Area
23.2 sq mi

Boundary

Boundary of California State Senate District 9

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Contra Costa County529.21 sq mi88.1%73.8%
Alameda County71.60 sq mi11.9%9.7%

Showing all 2 counties

Places

PlaceOverlapShare of district landShare of place land
Concord city30.55 sq mi5.1%99.9%
Antioch city29.17 sq mi4.9%100.0%
Walnut Creek city19.76 sq mi3.3%100.0%
San Ramon city18.68 sq mi3.1%93.1%
Danville town18.08 sq mi3.0%100.0%
Pittsburg city17.68 sq mi2.9%100.0%
Castro Valley CDP16.85 sq mi2.8%100.0%
Lafayette city15.02 sq mi2.5%100.0%
San Leandro city13.32 sq mi2.2%100.0%
Orinda city12.85 sq mi2.1%100.0%
Martinez city12.63 sq mi2.1%99.9%
Alamo CDP9.82 sq mi1.6%100.0%
Moraga town9.46 sq mi1.6%100.0%
Pleasant Hill city7.08 sq mi1.2%100.0%
Bay Point CDP6.43 sq mi1.1%100.0%
Blackhawk CDP5.78 sq mi1.0%100.0%
Clayton city3.84 sq mi0.6%100.0%
Norris Canyon CDP3.61 sq mi0.6%100.0%
San Lorenzo CDP3.05 sq mi0.5%100.0%
Reliez Valley CDP2.36 sq mi0.4%100.0%
Ashland CDP1.84 sq mi0.3%100.0%
Alhambra Valley CDP1.61 sq mi0.3%100.0%
Vine Hill CDP1.50 sq mi0.3%100.0%
Diablo CDP1.36 sq mi0.2%100.0%
Camino Tassajara CDP1.28 sq mi0.2%100.0%

Showing top 25 of 38 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
CA District 10591,12359.6%77.8%73.1%
CA District 8172,95017.4%22.8%15.0%
CA District 14156,23515.8%20.6%10.1%
CA District 1270,8557.1%9.3%1.8%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Demographics

Total Population
979,379 (± 3,314)
Median Age
41.2
Median Household Income
$128,465 (± $2,081)
High School Graduate or Higher (age 25+)
89.7%
Bachelor's Degree or Higher (age 25+)
46.4%

Population by Age

GroupPeopleShare
Under 18210,53321.5%
18 to 64595,42260.8%
65 and over173,42417.7%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)245,79225.1%
White, not Hispanic375,46238.3%
Black, not Hispanic68,2727.0%
Asian, not Hispanic216,95822.2%
American Indian / Alaska Native, not Hispanic1,9190.2%
Native Hawaiian / Pacific Islander, not Hispanic4,9970.5%
Some other race, not Hispanic6,4060.7%
Two or more races, not Hispanic59,5736.1%

Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.

Citizen Voting Age Population

Total Citizen Population
871,012
Citizen Voting Age Population (CVAP)
669,628

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic675,59377.6%
Hispanic195,41922.4%
White375,97243.2%
Black65,7727.6%
Asian179,31520.6%
American Indian / Alaska Native1,8620.2%
Native Hawaiian / Pacific Islander4,6890.5%
Two or More Races10,6151.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic541,75780.9%
Hispanic127,87519.1%
White318,15647.5%
Black57,1018.5%
Asian151,05422.6%
American Indian / Alaska Native6,0680.9%
Native Hawaiian / Pacific Islander3,4980.5%
Two or More Races6,8731.0%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).