Colorado State Senate seat · lines in effect since 2022
Colorado Senate District 21
A district of about 173,000 people, 50% Hispanic, 24% of adults with a bachelor's degree. It votes D+6.8 relative to the nation for president.
2024 election
Nov 5, 2024- Dafna Michaelson Jenet (D) · won51.1%
- Frederick Alfred Jr. (R)48.9%
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
16 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 | Dafna Michaelson Jenet (D) | Frederick Alfred Jr. (R) | 2.2 |
| Lines first used in 2012 | |||
| 2020 | Dominick Moreno (D) | Martin Mendez (R) | 27.1 |
| 2016 | Dominick Moreno (D) | Kara Leach Palfy (R) | 98.2 |
| 2012 | Jessie Ulibarri (D) | Francine R. Bigelow (R) | 29.9 |
| Lines first used in 2002 | |||
| 2008 | Betty Boyd (D) | Natalie Menten (R) | 18.9 |
| 2006 special | Betty Boyd (D) | Matthew J. Knoedler (R) | 12.9 |
| 2004 | Deanna Hanna (D) | Tori Merritts (R) | 19.0 |
| Lines first used in 1992 | |||
| 2000 | Deanna Hanna (D) | Penn R. Pfiffner (R) | 8.5 |
| 1996 | Michael F. Feeley (D) | Garon L. Reeves (R) | 4.6 |
| 1992 | Michael F. Feeley (D) | Lynn M. Watwood Jr. (R) | 13.7 |
| Lines first used in 1982 | |||
| 1988 | Bonnie J. Allison (R) | — | Unopposed |
| 1984 | Jim Lee (R) | Kirk P. Brady (D) | 12.6 |
| Lines first used in 1972 | |||
| 1980 | J. Robert Allshouse (R) | Gerard Frank (D) | 6.5 |
| 1976 | J. Robert Allshouse (R) | Steele (D) | 13.7 |
| 1972 | J. Robert Allshouse (R) | Cordelle H. Brooner (D) | 26.3 |
| Lines first used in 1962 | |||
| 1968 | Hugh C. Fowler (R) | Alex S. Keller (D) | 29.8 |
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 21
The state's districts in other chambers that share residents with this one, and the share of District 21'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.
| 2016 | 2018 | 2020 | 2024 | |
|---|---|---|---|---|
| President | D+8.9 | No race | No race | D+3.7 |
| U.S. Senate | D+12.8 | No race | D+14.0 | No race |
| Governor | No race | D+14.1 | 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 21.
Lower than 97% of seats.
Lower than 65% of seats.
Highest of 35 seats.
Higher than 59% of seats.
Lower than 71% of seats.
Less dense than 74% 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 342% Hispanic · 26% college gradsR+3.5CountingDistrict 13
45% Hispanic · 22% college gradsR+9.7Not up in 2026District 24
40% Hispanic · 32% college gradsD+8.5Held DDistrict 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