South Carolina State Senate seat · lines in effect since 2022
South Carolina Senate District 18
A district of about 112,000 people, 41% of adults with a bachelor's degree. It votes R+29.4 relative to the nation for president.
2024 election
Nov 5, 2024- Ronnie Cromer (R) · won98.6%
- Write-ins and other votes (OTH)1.4%
Unopposed.
Source: South Carolina State Election CommissionUpdated Oct 1, 2026, 6:13 AM ET
Where it sits among all 46 seats
Every South Carolina 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
12 races since 1968; the seat changed party 1 time. 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 | Ronnie Cromer (R) | — | Unopposed |
| Lines first used in 2012 | |||
| 2020 | Ronnie Cromer (R) | Christopher Thibault (D) | 44.5 |
| 2016 | Ronnie Cromer (R) | — | Unopposed |
| 2012 | Ronnie Cromer (R) | — | Unopposed |
| Lines first used in 2002 | |||
| 2008 | Ronnie Cromer (R) | Michael Ray Ellisor (D) | 44.4 |
| 2004 | Ronnie Cromer (R) | — | Unopposed |
| Lines first used in 1992 | |||
| 2000 | Andre Bauer (R)Flip | Dave C. Waldrop Jr. (D) | 27.8 |
| 1996 | James A. Lander (D) | Jim Gordon (R) | 11.1 |
| 1992 | James A. Lander (D) | Earle J. Bedenbaugh (R) | 11.7 |
| Lines first used in 1982 | |||
| 1988 | Thomas H. Pope III (D) | — | Unopposed |
| 1984 | Thomas H. Pope III (D) | — | Unopposed |
| Lines first used in 1962 | |||
| 1968 | Donald H. Holland · Frank L. Roddey (D) | — | Unopposed |
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 18
The state's districts in other chambers that share residents with this one, and the share of District 18's area in each.
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2024 | |
|---|---|
| President | R+29.6 |
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 46 seats. Small marks are other seats in South Carolina. The black marker is District 18.
Higher than 82% of seats.
Higher than 53% of seats.
Lower than 71% of seats.
Lower than 60% of seats.
Higher than 78% of seats.
Less dense 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.
District 1022% Black · 35% college gradsR+38.0Not up in 2026District 37
23% Black · 37% college gradsR+20.1Not up in 2026District 24
25% Black · 36% college gradsR+23.7Not up in 2026District 15
36% college gradsR+23.3Not 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