99chambers

Alaska House of Representatives seat · lines in effect since 2022

Alaska House District 15

A district of about 13,000 people, 44% of adults with a bachelor's degree. It votes R+2.5 relative to the nation for president.

Mia Costello (R) · since Nov 2, 2010Flipped in 2026Next election Nov 7, 2028The 2026 race →

Where it sits among all 40 seats

Every Alaska 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+2.517th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict 15

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
Alaska House of RepresentativesR+6.3R+3.3D+5.0

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

Source: 99chambers results archive: precinct results allocated to current lines; 2026: Alaska Division of ElectionsUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 40 seats. Small marks are other seats in Alaska. The black marker is District 15.

Adults with a bachelor's degree44% 95th pct · 3rd of 40 in AK

Higher than 95% of seats.

White adults without a degree34% 44th pct · 23rd of 40 in AK

Lower than 56% of seats.

Hispanic residents5% 21st pct · 32nd of 40 in AK

Lower than 79% of seats.

Black residents4% 72nd pct · 12th of 40 in AK

Higher than 72% of seats.

Asian residents7% 59th pct · 17th of 40 in AK

Higher than 59% of seats.

People per square mile882 74th pct · 11th of 40 in AK

Denser than 74% 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 11
43% college gradsR+3.6Held RDistrict 16
44% college gradsD+15.6Held DDistrict 10
38% college gradsR+3.3Held RDistrict 9
63% college gradsD+1.8Held O

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. Denny Wells (D)
    2027– · Won 2026 by 5.0
  2. Mia Costello (R)
    2025–2027 · Won 2024 by 6.0
  3. Denny Wells (D)
    2023–2025 · Won 2022 by 7.8

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