99chambers

California State Senate seat · lines in effect since 2022

California Senate District 4

A district of about 1,056,000 people, 36% Hispanic, 26% of adults with a bachelor's degree. It votes R+11.1 relative to the nation for president.

Marie Alvarado-Gil (R) · since Nov 8, 2022Next election Nov 5, 2030The 2026 race →

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.

R+11.137th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict 4

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

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

2026
California State SenateR+5.9

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: California Secretary of StateUpdated Nov 7, 2026, 3:01 PM 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 4.

Adults with a bachelor's degree26% 31st pct · 28th of 40 in CA

Lower than 69% of seats.

White adults without a degree40% 97th pct · 2nd of 40 in CA

Higher than 97% of seats.

Hispanic residents36% 51st pct · 20th of 40 in CA

Higher than 51% of seats.

Black residents2% 21st pct · 32nd of 40 in CA

Lower than 79% of seats.

Asian residents5% 5th pct · 38th of 40 in CA

Lower than 95% of seats.

People per square mile42 3rd pct · 39th of 40 in CA

Less dense than 97% 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 19
40% Hispanic · 28% college gradsR+2.6Not up in 2026District 12
38% Hispanic · 31% college gradsR+25.0Held RDistrict 1
21% Hispanic · 25% college gradsR+20.1Not up in 2026District 32
35% Hispanic · 35% college gradsR+14.0Held R

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

Who has held it

These lines took effect in 2022.

  1. Alexandra Duarte (R)
    2027– · Won 2026 by 5.9
  2. Marie Alvaradogil (D)
    2023–2027 · Won 2022 by 5.4

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)