Called by civicAPIUnofficial results
Colorado Senate District 1
Colorado State Senate · Colorado
Byron Pelton won re-election by 36.2 points over Jamie Jeffery.
Staggered Senate
Byron PeltonRepublican · winner · incumbent
68.1%47,817
Jamie JefferyDemocrat
31.9%22,421
70,238 votes
Source: Colorado Secretary of State unofficial results; race call: civicAPIUpdated Nov 7, 2026, 1:35 PM ET
Where the race moved
Against the 2024 presidential vote
The seat's recent races
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Money in this race
Each line compares the two campaigns on one scale.
Jamie JefferyByron Pelton
$8.5K
Raised by the campaign
$40.9K
$7.9K
Spent by the campaign
$29.3K
Campaign money: Colorado Secretary of State (TRACER), through Oct 26, 2026; Colorado Secretary of State (TRACER), through Oct 28, 2026.
Source: Colorado Secretary of State (TRACER) campaign filingsUpdated Oct 26, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
- Jamie Jeffery
- <1%
- Byron Pelton
- >99%
- Projected margin
- R+35.8