Missouri State Senate seat · lines in effect since 2022
Missouri Senate District 18
A district of about 177,000 people, 21% of adults with a bachelor's degree. It votes R+53.8 relative to the nation for president.
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.
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.
| 2018 | 2022 | 2026 | |
|---|---|---|---|
| U.S. Senate | R+37.9 | No race | No race |
| Missouri State Senate | No race | R+51.6 | R+42.7 |
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 18.
Lower than 85% of seats.
Higher than 94% of seats.
Lower than 94% of seats.
Lower than 64% of seats.
Lower than 76% of seats.
Less dense 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 1221% college gradsR+56.9Held RDistrict 27
25% college gradsR+55.9Not up in 2026District 3
MissouriR+52.8Not up in 2026District 26
23% college gradsR+48.4Held 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.
- Greg Sharpe (R)
2027– · Won 2026 by 42.7 - Cindy Olaughlin (R)
2023–2027 · Won 2022 by 51.6
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)