99chambers

U.S. House seat · lines in effect since 2022

Arizona's 5th District

A district of about 838,000 people, 41% of adults with a bachelor's degree. It votes R+19.3 relative to the nation for president.

Mark Lamb (R) · from Jan 3, 2027Next election Nov 7, 2028The 2026 race →
AZ-5

Source: 2026 results: Arizona 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.

R+19.3301st most
Democratic
Most DemocraticMost Republican218th seat · the majority line3746128AZ-59

Labels below the bar mark 8 other seats in Arizona.

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.

202220242026
U.S. HouseR+19.3R+20.7R+3.4

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 435 seats. Small marks are other seats in Arizona. The black marker is AZ-5.

Adults with a bachelor's degree41% 74th pct · 2nd of 9 in AZ

Higher than 74% of seats.

White adults without a degree41% 57th pct · 4th of 9 in AZ

Higher than 57% of seats.

Hispanic residents18% 62nd pct · 8th of 9 in AZ

Higher than 62% of seats.

Black residents3% 24th pct · 8th of 9 in AZ

Lower than 76% of seats.

Asian residents6% 70th pct · 1st of 9 in AZ

Higher than 70% of seats.

People per square mile2,064 79th pct · 3rd of 9 in AZ

Denser than 79% 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.

AZ-8
22% Hispanic · 33% college gradsR+15.7Held RNY-2
25% Hispanic · 36% college gradsR+11.2Held RNJ-4
40% college gradsR+28.4Held RFL-5
46% college gradsR+20.4Held 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. Mark Lamb (R)
    2027– · Won 2026 by 3.4
  2. Andy Biggs (R)
    2023–2027 · Won 2022 by 19.3, 2024 by 20.7

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