# 2010 Colorado elections

Elections in Colorado :
Federal government
Presidential elections
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Presidential caucuses and primaries
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U.S. Senate elections
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State government
General elections
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Gubernatorial elections
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Secretary of State elections
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Attorney General elections
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Treasurer elections
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Colorado State Board of Regent elections
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Senate elections
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House of Representatives elections
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2024 :
Ballot measures
List of Colorado ballot measures
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Colorado Springs
Local elections
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Mayoral elections
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Denver
Mayoral elections
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El Paso County
Local elections
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Pueblo
Mayoral elections
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vte :
A general election was held in the U.S. state of Colorado on November 2, 2010. All of Colorado's executive officers were up for election as well as a United States Senate seat and all of Colorado's seven seats in the United States House of Representatives. Primary elections were held on August 10, 2010.

## Federal
### United States Senate

Incumbent Senator and Democratic nominee Michael Bennet defeated Republican nominee Ken Buck in the general election.

### United States House

All seven Colorado seats in the United States House of Representatives were up for election in 2010.

## Attorney General

Despite being courted in 2008 and 2010 to run for the U.S. Senate, Incumbent Republican Attorney General John Suthers chose to run for re-election. Suthers defeated his Democratic opponent, Stan Garnett, by a 13-point margin – the largest margin of victory in a statewide race in Colorado in 2010. As of 2025, this was the last time a Republican would win Colorado by double digits.
2010 Colorado Attorney General election :
| Party | Party | Candidate | Votes | % |
| | Republican | John Suthers (incumbent) | 960,143 | 56.35% |
| | Democratic | Stan Garnett | 743,750 | 43.65% |
| Total votes | Total votes | Total votes | 1,703,893 | 100.00% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Secretary of State

In 2009, Democrat Bernie Buescher was appointed by Governor Bill Ritter to serve as Colorado Secretary of State, succeeding Republican Mike Coffman. Buescher ran for a full term in 2010 but lost to Republican Scott Gessler by 5.7%.
2010 Colorado Secretary of State election :
| Party | Party | Candidate | Votes | % |
| | Republican | Scott Gessler | 852,818 | 49.52% |
| | Democratic | Bill Ritter (incumbent) | 755,522 | 43.87% |
| | Constitution | Amanda Campbell | 113,756 | 6.61% |
| Total votes | Total votes | Total votes | 1,722,096 | 100.00% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

## State Treasurer

Incumbent Democratic State Treasurer Cary Kennedy unsuccessfully ran for re-election, narrowly losing to her Republican opponent Walker Stapleton.
2010 Colorado State Treasurer election :
| Party | Party | Candidate | Votes | % |
| | Republican | Walker Stapleton | 866,934 | 50.70% |
| | Democratic | Cary Kennedy (incumbent) | 842,877 | 49.30% |
| Total votes | Total votes | Total votes | 1,709,811 | 100.00% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

## State legislature
### State Senate

One-half of the seats of the Colorado Senate were up for election in 2010.

### State House of Representatives

All of the seats in the Colorado House of Representatives were up for election in 2010.

## Judicial elections

Multiple judicial positions were up for election in 2010.
* Colorado judicial elections, 2010 at Ballotpedia

## Ballot measures

Seven measures were certified for the 2010 ballot.
* Colorado 2010 ballot measures at Ballotpedia
* 2010 Colorado Amendment 62

## Local

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