99chambers

Arizona State Senate seat · lines in effect since 2022

Arizona Legislative District 21

A district of about 259,000 people, 58% Hispanic, 24% of adults with a bachelor's degree. It votes D+21.0 relative to the nation for president.

Rosanna Gabaldón (D) · since Nov 3, 2020Next election Nov 7, 2028The 2026 race →

Where it sits among all 30 seats

Every Arizona 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.

D+21.010th most
Democratic
Most DemocraticMost Republican16th seat · the majority lineDistrict 21

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 State SenateD+28.1D+38.1

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 21.

Adults with a bachelor's degree24% 31st pct · 21st of 30 in AZ

Lower than 69% of seats.

White adults without a degree24% 24th pct · 23rd of 30 in AZ

Lower than 76% of seats.

Hispanic residents58% 86th pct · 5th of 30 in AZ

Higher than 86% of seats.

Black residents4% 59th pct · 13th of 30 in AZ

Higher than 59% of seats.

Asian residents2% 21st pct · 24th of 30 in AZ

Lower than 79% of seats.

People per square mile123 28th pct · 22nd of 30 in AZ

Less dense 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 23
62% HispanicD+4.6Held DDistrict 24
68% HispanicD+23.7Held DDistrict 20
53% Hispanic · 28% college gradsD+45.7Held DDistrict 26
64% HispanicD+31.7Held 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. Rosanna Gabaldón (D)
    2027– · Won 2026 by 38.1
  2. Rosanna Gabaldon (D)
    2023–2027 · Won 2022 by 28.1, 2024 by 90.6

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