# 2006 South Dakota gubernatorial election

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The 2006 South Dakota gubernatorial election was held on November 7, 2006. Incumbent Republican Governor Mike Rounds defeated Democrat Jack Billion to serve a second term as governor.

## Democratic primary
### Candidates

* Jack Billion, former South Dakota State Representative
* Dennis Weise, president of the South Dakota Farmers Union

### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jack Billion | 22,527 | 61.91 |
| | Democratic | Dennis Weise | 13,862 | 38.09 |
| Total votes | Total votes | Total votes | 36,389 | 100.00 |

## Republican primary
### Candidates

* Mike Rounds, incumbent Governor of South Dakota

### Results

Governor Rounds faced no opposition in the Republican primary.

## Minor parties
### Libertarian Party

* Tom Gerber

### Constitution Party

* Steven J. Willis, small business owner, Navy veteran, conservative activist

## General election
### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Solid R | November 6, 2006 |
| Sabato's Crystal Ball | Safe R | November 6, 2006 |
| Rothenberg Political Report | Safe R | November 2, 2006 |
| Real Clear Politics | Safe R | November 6, 2006 |

### Election results

South Dakota gubernatorial election, 2006 :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Mike Rounds (incumbent) | 206,990 | 61.69% | +4.93% |
| | Democratic | Jack Billion | 121,226 | 36.13% | −5.79% |
| | Constitution | Steven J. Willis | 4,010 | 1.20% | |
| | Libertarian | Tom Gerber | 3,282 | 0.98% | +0.39% |
| Majority | Majority | Majority | 85,764 | 25.56% | +10.72% |
| Turnout | Turnout | Turnout | 335,508 | | |
| | Republican hold | Republican hold | Swing | | |

#### Counties that flipped from Democratic to Republican

* Day (largest city: Webster)
* Roberts (largest city: Sisseton)
* Ziebach (largest city: Dupree)
* Corson (Largest city: McLaughlin)
* Dewey (Largest city: North Eagle Butte)
* Bennett (largest city: Martin)
* Yankton (largest city: Yankton)