99chambers

South Dakota House of Representatives seat · lines in effect since 2022

South Dakota Legislative District 12

A district of about 30,000 people, 44% of adults with a bachelor's degree. It votes R+4.7 relative to the nation for president.

Amber Arlint (R) · since Nov 8, 2022Greg Jamison (R) · since Nov 8, 2016Next election Nov 7, 2028The 2026 race →

Where it sits among all 34 seats

Every South Dakota 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+4.77th most
Democratic
Most DemocraticMost Republican18th seat · the majority lineDistrict 12

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.

20162020202220242026
U.S. SenateR+23.6D+0.4No raceNo raceNo race
South Dakota House of RepresentativesNo raceNo raceR+12.4R+14.9D+12.1

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

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

Who lives here, compared

Grey bars show the spread of all 34 seats. Small marks are other seats in South Dakota. The black marker is District 12.

Adults with a bachelor's degree44% 85th pct · 6th of 34 in SD

Higher than 85% of seats.

White adults without a degree49% 21st pct · 27th of 34 in SD

Lower than 79% of seats.

Hispanic residents5% 61st pct · 14th of 34 in SD

Higher than 61% of seats.

Black residents3% 82nd pct · 7th of 34 in SD

Higher than 82% of seats.

Asian residents2% 82nd pct · 7th of 34 in SD

Higher than 82% of seats.

People per square mile3,083 97th pct · 2nd of 34 in SD

Denser than 97% 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 14
45% college gradsR+2.9SplitDistrict 13
52% college gradsR+10.3SplitDistrict 34
44% college gradsR+17.3Held RDistrict 17
44% college gradsR+18.0Held 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. Stephanie Arne (D)
    2027– · Won 2026 by 12.1
  2. Greg Jamison (R)
    2023–2027 · Won 2022 by 12.6, 2024 by 14.9
  3. Amber Arlint (R)
    2023– · Won 2022 by 12.4, 2024 by 17.3, 2026 by 10.4

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