Colorado State Senate seat · lines in effect since 2022
Colorado Senate District 10
A district of about 170,000 people, 40% of adults with a bachelor's degree. It votes R+10.3 relative to the nation for president.
2024 election
Nov 5, 2024- Larry Liston (R) · won57.1%
- Ryan Howard Lucas (D)39.3%
- John C. Hjersman (LIB)3.7%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 35 seats
Every Colorado 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 1968. 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 | Larry Liston (R) | Ryan Howard Lucas (D) | 17.8 |
| Lines first used in 2012 | |||
| 2020 | Larry Liston (R) | Randi McCallian (D) | 18.2 |
| 2016 | Owen Hill (R) | Mark Anthony Barrionuevo (D) | 32.4 |
| 2012 | Owen Hill (R) | Brandon Hughes (I) | 56.4 |
| Lines first used in 2002 | |||
| 2008 | Bill Cadman (R) | Diane D. Whitley (D) | 30.0 |
| 2004 | Ron May (R) | — | Unopposed |
| Lines first used in 1992 | |||
| 2000 | Ron May (R) | Dan Tafoya (D) | 34.4 |
| 1996 | Ray Powers (R) | — | Unopposed |
| 1992 | Ray Powers (R) | — | Unopposed |
| Lines first used in 1982 | |||
| 1988 | Ray Powers (R) | — | Unopposed |
| 1984 | Ray Powers (R) | — | Unopposed |
| Lines first used in 1972 | |||
| 1980 | Ray Powers (R) | John D. Odonnell (D) | 39.4 |
| 1976 | Donald T. Harding (R) | Duran (D) | 13.8 |
| 1972 | Kingston G. Minister (R) | Bernard R. Baker (D) | 14.3 |
| Lines first used in 1962 | |||
| 1968 | Joe Shoemaker (R) | George A. Wester (D) | 41.2 |
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 10
The state's districts in other chambers that share residents with this one, and the share of District 10's area in each.
- U.S. House
- CO-5 100%
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 | 2018 | 2020 | 2024 | |
|---|---|---|---|---|
| President | R+26.0 | No race | No race | R+9.4 |
| U.S. Senate | R+26.1 | No race | R+17.0 | No race |
| Governor | No race | R+19.1 | No race | No race |
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 35 seats. Small marks are other seats in Colorado. The black marker is District 10.
Lower than 71% of seats.
Higher than 85% of seats.
Lower than 53% of seats.
Higher than 74% of seats.
Higher than 56% of seats.
Denser than 85% 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 2346% college gradsR+13.8Not up in 2026District 12
43% college gradsD+4.1Not up in 2026District 9
58% college gradsR+16.2Held RDistrict 11
30% Hispanic · 26% college gradsD+5.3Counting
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