Missouri State Senate seat · lines in effect since 2022
Missouri Senate District 9
A district of about 179,000 people, 54% Black, 20% of adults with a bachelor's degree. It votes D+58.6 relative to the nation for president.
2024 election
Nov 5, 2024- Barbara Washington (D) · won79.3%
- Derron Black (R)20.7%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
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 election for this seat
17 races since 1968; the seat changed party 2 times. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Barbara Washington (D) | Derron Black (R) | 58.6 |
| Lines first used in 2012 | |||
| 2020 | Barbara Washington (D) | David Martin (R) | 64.7 |
| 2016 | Shalonn Curls (D) | — | Unopposed |
| 2012 | Shalonn Curls (D) | — | Unopposed |
| Lines first used in 2002 | |||
| 2008 | Yvonne S. Wilson (D) | — | Unopposed |
| 2004 | Yvonne S. Wilson (D) | — | Unopposed |
| Lines first used in 1992 | |||
| 2000 | Mary Bland (D)Flip | — | Unopposed |
| 1998 special | Leorn King (R)Flip | — | Unopposed |
| 1996 | Phil Curls (D) | — | Unopposed |
| 1992 | Phil Curls (D) | Reed A. Chambers II (R) | 62.1 |
| Lines first used in 1982 | |||
| 1988 | Phil Curls (D) | Robert L. Collins (R) | 65.7 |
| 1984 | Phil Curls (D) | — | Unopposed |
| 1983 special election | Phil Curls (D) | Robert L. Collins (R) | 44.3 |
| Lines first used in 1972 | |||
| 1980 | Lee Swinton (D) | Robert L. Collins (R) | 61.6 |
| 1976 | Mary L. Gant (D) | — | Unopposed |
| 1972 | Mary L. Gant (D) | Daniel G. Giudici (R) | 40.5 |
| Lines first used in 1962 | |||
| 1968 | Edgar John Keating (D) | Victor Battle (R) | 24.8 |
Primaries: 1984 Democratic primary · 1980 Democratic primary · 1976 Democratic primary · 1972 Democratic primary · 1968 Republican primary · 1968 Democratic primary
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 9
The state's districts in other chambers that share residents with this one, and the share of District 9's area in each.
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 9.
Lower than 91% of seats.
Lower than 94% of seats.
Higher than 94% of seats.
Higher than 94% of seats.
Lower than 70% of seats.
Denser than 82% 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 1446% Black · 34% college gradsD+54.1Held DDistrict 5
57% Black · 34% college gradsD+77.7Not up in 2026District 13
69% Black · 23% college gradsD+63.1Not up in 2026District 7
51% college gradsD+50.3Not up in 2026
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