Utah State Senate seat · lines in effect since 2022
Utah Senate District 15
A district of about 113,000 people, 42% of adults with a bachelor's degree. It votes D+18.0 relative to the nation for president.
2024 election
Nov 5, 2024- Kathleen Riebe (D) · won57.1%
- Scott Cuthbertson (R)42.9%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 29 seats
Every Utah 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 1970. 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 | Kathleen Riebe (D) | Scott Cuthbertson (R) | 14.1 |
| Lines first used in 2012 | |||
| 2018 | Keith Grover (R) | Lee D. Houghton (I) | 63.4 |
| 2014 | Margaret Dayton (R) | Emmanuel Kepas (D) | 63.2 |
| Lines first used in 2002 | |||
| 2010 | Margaret Dayton (R) | Linnea S. Barney (D) | 57.0 |
| 2006 | Margaret Dayton (R) | Bethanie Newby (D) | 43.4 |
| 2002 | Parley Hellewell (R) | Beryl Furner (I) | 80.6 |
| Lines first used in 1992 | |||
| 1998 | Parley Hellewell (R) | Robert A. Davis (D) | 46.5 |
| 1994 | Leray McAllister (R) | J. Keith Melville (D) | 43.4 |
| Lines first used in 1982 | |||
| 1990 | Leray McAllister (R) | Will Christensen (I) | 58.1 |
| 1986 | Leray McAllister (R) | — | Unopposed |
| 1982 | Leray McAllister (R) | — | Unopposed |
| Lines first used in 1972 | |||
| 1978 | A. Dean Jeffs (R) | Keith Melville (D) | 18.7 |
| 1974 | A. Dean Jeffs (R) | John S. Staley (D) | 16.0 |
| 1972 | A. Dean Jeffs (R) | O. Geral Wilde (D) | 18.6 |
| Lines first used in 1962 | |||
| 1970 | Ernest Dean (D) | Douglas E. Johnson (R) | 22.4 |
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 15
The state's districts in other chambers that share residents with this one, and the share of District 15'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 | D+17.2 |
| U.S. Senate | D+6.3 |
| Governor | D+4.2 |
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 29 seats. Small marks are other seats in Utah. The black marker is District 15.
Higher than 64% of seats.
Lower than 64% of seats.
Higher than 64% of seats.
Higher than 75% of seats.
Higher than 86% of seats.
Denser than 57% 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. 1 of the 4 flipped this year.
District 847% college gradsD+1.9Not up in 2026District 14
56% college gradsD+31.9Held DDistrict 19
53% college gradsR+9.4Flipped DDistrict 17
46% college gradsR+16.6Not 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