# 1986 United States Senate election in Iowa

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The 1986 United States Senate election in Iowa was held November 4, 1986. Incumbent Republican United States Senator Chuck Grassley won re-election to a second term, defeating Democratic nominee, attorney John P. Roehrick in a landslide. This would be the last time that Grassley lost a county until 2010 when Roxanne Conlin flipped Johnson County.

## Democratic primary
### Candidates

* John P. Roehrick, attorney
* Juan Cortez

### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | John P. Roehrick | 88,347 | 83.83% |
| | Democratic | Juan Cortez | 16,987 | 16.12% |
| | Democratic | Write-ins | 60 | 0.06% |
| Total votes | Total votes | Total votes | 105,394 | 100.00% |

## Republican primary
### Candidates

* Chuck Grassley, incumbent United States Senator

### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Chuck Grassley (Incumbent) | 108,370 | 99.96% |
| | Republican | Write-ins | 38 | 0.04% |
| Total votes | Total votes | Total votes | 108,408 | 100.00% |

## General election
### Results

United States Senate election in Iowa, 1986 :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Chuck Grassley (Incumbent) | 588,880 | 66.04% | +12.55% |
| | Democratic | John P. Roehrick | 299,406 | 33.57% | −11.97% |
| | Independent | John Masters | 3,370 | 0.38% | |
| | Write-ins | | 106 | 0.01% | |
| Majority | Majority | Majority | 289,474 | 32.46% | +24.51% |
| Turnout | Turnout | Turnout | 891,762 | | |
| | Republican hold | Republican hold | Swing | | |