California State Senate seat · lines in effect since 2022
California Senate District 21
A district of about 1,043,000 people, 51% Hispanic, 33% of adults with a bachelor's degree. It votes D+25.1 relative to the nation for president.
Where it sits among all 40 seats
Every California State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who lives here, compared
Grey bars show the spread of all 40 seats. Small marks are other seats in California. The black marker is District 21.
Lower than 56% of seats.
Higher than 67% of seats.
Higher than 69% of seats.
Lower than 90% of seats.
Lower than 85% of seats.
Less dense than 82% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 1746% Hispanic · 35% college gradsD+34.8Not up in 2026District 18
69% Hispanic · 23% college gradsD+17.8Held DDistrict 3
31% Hispanic · 34% college gradsD+29.4Not up in 2026District 14
66% HispanicD+8.4Held D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET