Arizona State Senate seat · lines in effect since 2022
Arizona Legislative District 18
A district of about 241,000 people, 22% Hispanic, 46% of adults with a bachelor's degree. It votes D+24.4 relative to the nation for president.
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.
Democratic
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.
| 2022 | 2026 | |
|---|---|---|
| Arizona State Senate | D+24.4 | D+32.4 |
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 18.
Higher than 79% of seats.
Lower than 52% of seats.
Lower than 55% of seats.
Lower than 52% of seats.
Higher than 69% of seats.
Denser than 66% 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 828% Hispanic · 45% college gradsD+22.2Held DDistrict 5
35% Hispanic · 43% college gradsD+37.7Held DDistrict 12
51% college gradsD+16.8Held DDistrict 9
37% Hispanic · 28% college gradsD+3.9Held 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.
- Priya Sundareshan (D)
2023– · Won 2022 by 24.4, 2024 by 92.3, 2026 by 32.4
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)