99chambers

Arizona House of Representatives seat · lines in effect since 2022

Arizona Legislative District 10

A district of about 242,000 people, 31% of adults with a bachelor's degree. It votes R+21.0 relative to the nation for president.

Justin Olson (R) · since Nov 5, 2024Ralph Heap (R) · since Nov 5, 2024Next election Nov 7, 2028The 2026 race →

Where it sits among all 30 seats

Every Arizona House of Representatives 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+21.022nd most
Democratic
Most DemocraticMost Republican16th 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.

20222026
Arizona House of RepresentativesR+15.2R+8.1

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

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

Who lives here, compared

Grey bars show the spread of all 30 seats. Small marks are other seats in Arizona. The black marker is District 10.

Adults with a bachelor's degree31% 59th pct · 13th of 30 in AZ

Higher than 59% of seats.

White adults without a degree51% 93rd pct · 3rd of 30 in AZ

Higher than 93% of seats.

Hispanic residents18% 24th pct · 23rd of 30 in AZ

Lower than 76% of seats.

Black residents3% 31st pct · 21st of 30 in AZ

Lower than 69% of seats.

Asian residents2% 34th pct · 20th of 30 in AZ

Lower than 66% of seats.

People per square mile2,850 72nd pct · 9th of 30 in AZ

Denser than 72% 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 15
21% Hispanic · 35% college gradsR+30.0Held RDistrict 29
27% Hispanic · 30% college gradsR+17.2SplitDistrict 27
28% Hispanic · 29% college gradsR+10.6CountingDistrict 28
39% college gradsR+23.4Held 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. James Rogers (R)
    2027– · Won 2026 by 8.1
  2. Justin Olson (I)
    2025– · Won 2024 by 23.0, 2026 by 9.2
  3. Justin Heap (R)
    2023–2027 · Won 2022 by 16.1, 2024 by 21.7
  4. Barbara Rowley Parker (R)
    2023–2025 · Won 2022 by 15.2

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