California State Senate District 21

State Legislative District Profile (Upper Chamber)

Overview

District ID
ca-sd-021
State
California
Chamber
Upper chamber (state senate)
District Code
021
Land Area
5,752.9 sq mi
Water Area
1,457.5 sq mi

Boundary

Boundary of California State Senate District 21

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Santa Barbara County2733.94 sq mi47.5%100.0%
Ventura County1655.25 sq mi28.8%89.9%
San Luis Obispo County1363.76 sq mi23.7%41.3%

Showing all 3 counties

Places

PlaceOverlapShare of district landShare of place land
Oxnard city26.53 sq mi0.5%99.9%
Santa Maria city22.81 sq mi0.4%100.0%
Vandenberg AFB CDP22.39 sq mi0.4%100.0%
San Buenaventura (Ventura) city21.88 sq mi0.4%100.0%
Camarillo city19.69 sq mi0.3%100.0%
Santa Barbara city19.51 sq mi0.3%100.0%
Eastern Goleta Valley CDP16.60 sq mi0.3%100.0%
Nipomo CDP15.08 sq mi0.3%100.0%
Lompoc city11.62 sq mi0.2%100.0%
Orcutt CDP10.82 sq mi0.2%100.0%
Toro Canyon CDP9.39 sq mi0.2%100.0%
Montecito CDP9.18 sq mi0.2%99.9%
Goleta city7.85 sq mi0.1%100.0%
Santa Paula city5.53 sq mi0.1%100.0%
Vandenberg Village CDP5.27 sq mi0.1%100.0%
Santa Ynez CDP4.83 sq mi0.1%100.0%
Mira Monte CDP4.81 sq mi0.1%100.0%
Port Hueneme city4.41 sq mi0.1%100.0%
Ojai city4.36 sq mi0.1%100.0%
Oak View CDP3.41 sq mi0.1%100.0%
Fillmore city3.30 sq mi0.1%100.0%
Piru CDP3.18 sq mi0.1%100.0%
Ballard CDP2.79 sq mi<0.1%100.0%
Los Olivos CDP2.62 sq mi<0.1%100.0%
Carpinteria city2.59 sq mi<0.1%100.0%

Showing top 25 of 49 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 24638,62562.3%83.5%73.9%
CA District 26386,06537.7%50.9%26.1%

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

Demographics

Total Population
1,017,686 (± 2,473)
Median Age
36.9
Median Household Income
$98,590 (± $1,651)
High School Graduate or Higher (age 25+)
81.4%
Bachelor's Degree or Higher (age 25+)
32.8%

Population by Age

GroupPeopleShare
Under 18228,57722.5%
18 to 64615,10060.4%
65 and over174,00917.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)527,01651.8%
White, not Hispanic376,45537.0%
Black, not Hispanic15,7421.5%
Asian, not Hispanic53,8335.3%
American Indian / Alaska Native, not Hispanic1,9350.2%
Native Hawaiian / Pacific Islander, not Hispanic1,3430.1%
Some other race, not Hispanic4,6530.5%
Two or more races, not Hispanic36,7093.6%

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
890,577
Citizen Voting Age Population (CVAP)
668,292

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic471,60053.0%
Hispanic418,97547.0%
White378,65042.5%
Black15,7911.8%
Asian44,8735.0%
American Indian / Alaska Native1,8200.2%
Native Hawaiian / Pacific Islander1,2050.1%
Two or More Races5,4910.6%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic403,57560.4%
Hispanic264,71539.6%
White329,70649.3%
Black17,3372.6%
Asian45,3846.8%
American Indian / Alaska Native6,5301.0%
Native Hawaiian / Pacific Islander1,0740.2%
Two or More Races3,7480.6%

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