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Ageneral election was held in theU.S. state ofColorado on November 2, 2010. All of Colorado's executive officers were up for election as well as aUnited States Senate seat and all of Colorado's seven seats in theUnited States House of Representatives.Primary elections were held on August 10, 2010.
Incumbent Senator and Democratic nomineeMichael Bennet defeated Republican nomineeKen Buck in the general election.
All seven Colorado seats in theUnited States House of Representatives were up for election in 2010.
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Suthers: 50–60% 60–70% 70–80% 80–90% >90% Garnett: 50–60% 60–70% 70–80% 80–90% >90% Tie: 50% | |||||||||||||||||
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Despite being courted in2008 and2010 to run for the U.S. Senate, incumbentRepublican Attorney GeneralJohn Suthers chose to run for re-election. Suthers defeated his Democratic opponent, Stan Garnett, by a 13-point margin[citation needed] – the largest margin of victory in a statewide race in Colorado in 2010.[1] As of 2026, this was the last time a Republican would win Colorado by double digits.
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | John Suthers (incumbent) | 960,143 | 56.35% | |
| Democratic | Stan Garnett | 743,750 | 43.65% | |
| Total votes | 1,703,893 | 100.00% | ||
| Republicanhold | ||||
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Gessler: 40–50% 50–60% 60–70% 70–80% Buescher: 40–50% 50–60% 60–70% | |||||||||||||||||||||
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In 2009,DemocratBernie Buescher was appointed by GovernorBill Ritter to serve as Colorado Secretary of State, succeedingRepublicanMike Coffman. Buescher ran for a full term in 2010 but lost to RepublicanScott Gessler by 5.7%.[2]
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Scott Gessler | 852,818 | 49.52% | |
| Democratic | Bernie Buescher (incumbent) | 755,522 | 43.87% | |
| Constitution | Amanda Campbell | 113,756 | 6.61% | |
| Total votes | 1,722,096 | 100.00% | ||
| Republicangain fromDemocratic | ||||
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Stapleton: 50–60% 60–70% 70–80% Kennedy: 50–60% 60–70% 70–80% | |||||||||||||||||
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IncumbentDemocratic State TreasurerCary Kennedy unsuccessfully ran for re-election, narrowly losing to her Republican opponentWalker Stapleton.[3][4]
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Walker Stapleton | 866,934 | 50.70% | |
| Democratic | Cary Kennedy (incumbent) | 842,877 | 49.30% | |
| Total votes | 1,709,811 | 100.00% | ||
| Republicangain fromDemocratic | ||||
One-half of the seats of theColorado Senate were up for election in 2010.
All of the seats in theColorado House of Representatives were up for election in 2010.
Multiple judicial positions were up for election in 2010.
Seven measures were certified for the 2010 ballot.









Many elections for county offices were also held on November 2, 2010.
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