Mississippi State Senate seat · lines in effect since 2026
Mississippi Senate District 12
A district of about 57,000 people, 70% Black, 21% of adults with a bachelor's degree. It votes D+37.0 relative to the nation for president.
2023 election
Nov 7, 2023- Derrick Simmons (D) · won100.0%
Unopposed.
Source: OpenElections (from MS Secretary of State)Updated Sep 30, 2026, 12:47 PM ET
Where it sits among all 51 seats
Every Mississippi 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
15 races since 1971. 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 | |||
| 2023 | Derrick Simmons (D) | — | Unopposed |
| Lines first used in 2012 | |||
| 2019 | Derrick Simmons (D) | Paul D. Pecou (I) | 62.9 |
| 2015 | Derrick Simmons (D) | — | Unopposed |
| Lines first used in 2002 | |||
| 2011 | Derrick Simmons (D) | — | Unopposed |
| 2007 | Johnnie E. Walls Jr. (D) | — | Unopposed |
| 2003 | Johnnie E. Walls Jr. (D) | — | Unopposed |
| Lines first used in 1992 | |||
| 1999 | Johnnie E. Walls Jr. (D) | — | Unopposed |
| 1995 | Johnnie E. Walls Jr. (D) | — | Unopposed |
| 1992 | Johnnie E. Walls Jr. (D) | — | Unopposed |
| Lines first used in 1982 | |||
| 1991 | Nevin Sledge (D) | — | Unopposed |
| 1987 | Nevin Sledge (D) | — | Unopposed |
| 1983 | Nevin Sledge (D) | Gregory Flippins (I) | 38.4 |
| Lines first used in 1972 | |||
| 1979 | William B. Alexander (D) | Thomas Morris (I) | 37.6 |
| 1975 | John Kenneth Gresham · Howard Dyer (D) | Ollie Mohamed (I) | 3.0 |
| Lines first used in 1962 | |||
| 1971 | John Kenneth Gresham · Willard L. McIlwain (D) | Jake Ayers (I) | 18.4 |
Primaries: 1987 Democratic primary · 1975 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 12
The state's districts in other chambers that share residents with this one, and the share of District 12's area in each.
- U.S. House
- MS-2 100%
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2020 | 2024 | |
|---|---|---|---|
| President | D+35.0 | D+40.6 | D+34.3 |
| U.S. Senate | No race | D+46.5 | D+30.0 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 51 seats. Small marks are other seats in Mississippi. The black marker is District 12.
Lower than 60% of seats.
Lower than 94% of seats.
Lower than 72% of seats.
Higher than 96% of seats.
Higher than 54% of seats.
Less dense than 96% 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 1365% Black · 24% college gradsD+31.1Not up in 2026District 32
61% BlackD+27.6Not up in 2026District 37
60% BlackD+21.1Not up in 2026District 24
66% BlackD+14.7Not 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