Delaware State Senate seat · lines in effect since 2022
Delaware Senate District 21
A district of about 59,000 people, 18% of adults with a bachelor's degree. It votes R+35.1 relative to the nation for president.
2024 election
Nov 5, 2024- Bryant Richardson (R) · won100.0%
Unopposed.
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 21 seats
Every Delaware 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 1972; 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 | Bryant Richardson (R) | — | Unopposed |
| 2022 | Bryant Richardson (R) | Sonja Mehaffey (I) | 78.2 |
| Lines first used in 2012 | |||
| 2018 | Bryant Richardson (R) | Robert C. Wheatley (D) | 30.1 |
| 2014 | Bryant Richardson (R)Flip | Robert L. Venables Sr. (D) | 7.1 |
| 2012 | Robert L. Venables Sr. (D) | Bryant Richardson (R) | 12.9 |
| Lines first used in 2002 | |||
| 2008 | Robert L. Venables Sr. (D) | — | Unopposed |
| 2004 | Robert L. Venables Sr. (D) | Danny Short (R) | 19.3 |
| 2002 | Robert L. Venables Sr. (D) | — | Unopposed |
| Lines first used in 1992 | |||
| 1998 | Robert L. Venables Sr. (D) | — | Unopposed |
| 1994 | Robert L. Venables Sr. (D) | — | Unopposed |
| 1992 | Robert L. Venables Sr. (D) | William A. Slatcher (R) | 28.9 |
| Lines first used in 1982 | |||
| 1988 | Robert L. Venables Sr. (D)Flip | William A. Slatcher (R) | 0.9 |
| 1984 | William A. Slatcher (R) | Robert T. Webb (D) | 2.7 |
| 1982 | Lee Littleton (R) | Robert T. Webb (D) | 2.2 |
| Lines first used in 1972 | |||
| 1980 | Lee Littleton (R) | Jane W. Horn (D) | 16.1 |
| 1976 | Lee Littleton (R) | Herbert W. Dayton (D) | 12.9 |
| 1972 | David H. Elliott (R) | Robert W. Allen (D) | 39.1 |
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 21
The state's districts in other chambers that share residents with this one, and the share of District 21's area in each.
- U.S. House
- DE-AL 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.
| 2024 | |
|---|---|
| President | R+36.7 |
| U.S. Senate | R+32.4 |
| Governor | R+34.5 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 21 seats. Small marks are other seats in Delaware. The black marker is District 21.
Lowest of 21 seats.
Highest of 21 seats.
Higher than 65% of seats.
Lower than 65% of seats.
Lower than 95% of seats.
Less dense than 80% 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 1524% college gradsR+27.9Held RDistrict 18
20% Hispanic · 22% college gradsR+20.4Not up in 2026District 19
31% college gradsR+12.2Held RDistrict 20
41% college gradsR+15.8Held 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