99chambers

Missouri State Senate seat · lines in effect since 2022

Missouri Senate District 8

A district of about 180,000 people, 43% of adults with a bachelor's degree. It votes R+5.9 relative to the nation for president.

Mike Cierpiot (R) · since Nov 6, 2018Flipped in 2026Next election Nov 5, 2030The 2026 race →

Where it sits among all 34 seats

Every Missouri 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.

R+5.913th most
Democratic
Most DemocraticMost Republican18th seat · the majority lineDistrict 8

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
Missouri State SenateR+11.6D+10.5

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

Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated 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 Missouri. The black marker is District 8.

Adults with a bachelor's degree43% 82nd pct · 7th of 34 in MO

Higher than 82% of seats.

White adults without a degree46% 27th pct · 25th of 34 in MO

Lower than 73% of seats.

Hispanic residents6% 76th pct · 9th of 34 in MO

Higher than 76% of seats.

Black residents8% 73rd pct · 10th of 34 in MO

Higher than 73% of seats.

Asian residents2% 58th pct · 15th of 34 in MO

Higher than 58% of seats.

People per square mile825 67th pct · 12th of 34 in MO

Denser than 67% 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. 1 of the 4 flipped this year.

District 23
41% college gradsR+7.3Not up in 2026District 34
37% college gradsR+10.4CountingDistrict 30
31% college gradsR+3.2Flipped DDistrict 2
46% college gradsR+23.8Held 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. Keri Ingle (D)
    2027– · Won 2026 by 10.5
  2. Mike Cierpiot (R)
    2023–2027 · Won 2022 by 11.6

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