99chambers

U.S. House seat · lines in effect since 2026

California's 51st District

A district of about 762,000 people, 28% Hispanic, 41% of adults with a bachelor's degree. It votes D+20.0 relative to the nation for president.

Sara Jacobs (D) · since Jan 3, 2021Next election Nov 7, 2028The 2026 race →
CA-51

Source: 2026 results: California Secretary of State; boundaries: Census Bureau TIGER/LineUpdated Nov 7, 2026, 3:01 PM ET

Where it sits among all 435 seats

Every U.S. House seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

D+20.0120th most
Democratic
Most DemocraticMost Republican218th seat · the majority line121137344315161730364429148191018322824252CA-51465041263843194273339149273547321625451348224023520

Labels below the bar mark 51 other seats in California.

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
U.S. HouseD+28.0

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 435 seats. Small marks are other seats in California. The black marker is CA-51.

Adults with a bachelor's degree41% 74th pct · 17th of 52 in CA

Higher than 74% of seats.

White adults without a degree29% 33rd pct · 9th of 52 in CA

Lower than 67% of seats.

Hispanic residents28% 80th pct · 32nd of 52 in CA

Higher than 80% of seats.

Black residents6% 46th pct · 14th of 52 in CA

Lower than 54% of seats.

Asian residents8% 79th pct · 38th of 52 in CA

Higher than 79% of seats.

People per square mile1,287 73rd pct · 24th of 52 in CA

Denser than 73% 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.

MA-3
23% Hispanic · 40% college gradsD+21.5Held DIL-10
25% Hispanic · 46% college gradsD+23.4Held DCO-6
23% Hispanic · 45% college gradsD+21.4Held DCA-42
32% Hispanic · 46% college gradsD+15.2Held 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

Who has held it

These lines took effect in 2026.

  1. Sara Jacobs (D)
    2027– · Won 2026 by 28.0

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