99chambers

California State Assembly seat · lines in effect since 2022

California Assembly District 10

A district of about 509,000 people, 27% Hispanic and 29% Asian, 30% of adults with a bachelor's degree. It votes D+31.4 relative to the nation for president.

Stephanie Nguyen (D) · since Nov 8, 2022Next election Nov 7, 2028The 2026 race →

Where it sits among all 80 seats

Every California State Assembly 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+31.430th most
Democratic
Most DemocraticMost Republican41st seat · the majority lineDistrict 10

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.

20242026
California State AssemblyD+35.2D+46.0

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 80 seats. Small marks are other seats in California. The black marker is District 10.

Adults with a bachelor's degree30% 42nd pct · 47th of 80 in CA

Lower than 58% of seats.

White adults without a degree16% 43rd pct · 46th of 80 in CA

Lower than 57% of seats.

Hispanic residents27% 33rd pct · 54th of 80 in CA

Lower than 67% of seats.

Black residents12% 92nd pct · 7th of 80 in CA

Higher than 92% of seats.

Asian residents29% 85th pct · 13th of 80 in CA

Higher than 85% of seats.

People per square mile4,378 70th pct · 25th of 80 in CA

Denser than 70% 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 20
31% Hispanic · 38% college gradsD+44.7Held DDistrict 79
44% Hispanic · 26% college gradsD+25.9Held DDistrict 15
32% Hispanic · 34% college gradsD+34.9Held DDistrict 6
25% Hispanic · 38% college gradsD+36.4Held 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

Who has held it

These lines took effect in 2022.

  1. Stephanie Nguyen (D)
    2023– · Won 2022 by 7.6, 2024 by 35.2, 2026 by 46.0

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