Indiana State Senate seat · lines in effect since 2022
Indiana Senate District 3
A district of about 132,000 people, 49% Black, 17% of adults with a bachelor's degree. It votes D+43.8 relative to the nation for president.
2024 election
Nov 5, 2024- Mark Spencer (D) · won73.1%
- Will Miller (R)26.9%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 50 seats
Every Indiana 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
14 races since 1972. 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 | Mark Spencer (D) | Will Miller (R) | 46.2 |
| Lines first used in 2012 | |||
| 2020 | Eddie D. Melton (D) | — | Unopposed |
| 2016 | Eddie D. Melton (D) | — | Unopposed |
| 2012 | Earline S. Rogers (D) | — | Unopposed |
| Lines first used in 2002 | |||
| 2008 | Earline S. Rogers (D) | — | Unopposed |
| 2004 | Earline S. Rogers (D) | — | Unopposed |
| Lines first used in 1992 | |||
| 2000 | Earline S. Rogers (D) | — | Unopposed |
| 1996 | Earline S. Rogers (D) | — | Unopposed |
| 1992 | Earline S. Rogers (D) | — | Unopposed |
| Lines first used in 1982 | |||
| 1988 | Carolyn Mosby (D) | — | Unopposed |
| 1984 | Carolyn Mosby (D) | Frederick Douglas Barefield (R) | 79.8 |
| Lines first used in 1972 | |||
| 1980 | Katie Hall (D) | — | Unopposed |
| 1976 | Katie Hall (D) | — | Unopposed |
| 1972 | Rudolph Clay (D) | Frederick Wood (R) | 78.8 |
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 3
The state's districts in other chambers that share residents with this one, and the share of District 3's area in each.
- U.S. House
- IN-1 100%
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 | D+40.7 |
| U.S. Senate | D+45.2 |
| Governor | D+44.8 |
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 50 seats. Small marks are other seats in Indiana. The black marker is District 3.
Lowest of 50 seats.
Lower than 90% of seats.
Higher than 88% of seats.
Higher than 98% of seats.
Lower than 88% of seats.
Denser than 69% 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 3453% Black · 25% college gradsD+61.0Not up in 2026District 33
37% Black · 39% college gradsD+66.5Not up in 2026District 10
30% college gradsD+17.1Not up in 2026District 46
34% college gradsD+41.7Held D
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