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 County results Grassley: 50-60% 60-70% 70-80% 80-90% >90% | |||||||||||||||||
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The2004 United States Senate election in Iowa was held on November 2, 2004. IncumbentRepublicanChuck Grassley ran for re-election to a fifth term. Grassley and formerState SenatorArthur A. Small won theRepublican andDemocratic primaries, respectively, unopposed, and faced each other in the general election. Though this election coincided with the highly competitivepresidential race, Grassley was not considered vulnerable and defeated Small in a landslide, winning more than 70% of the vote and outperforming Republican President George W. Bush by over 20% and almost 300,000 votes.
As of 2026, this is the last time a Republican Senate candidate wonJohnson County. This is also the last time that the winning U.S. Senate candidate in Iowa carried all 99 counties.
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Arthur A. Small | 52,318 | 99.25% | |
| Democratic | Write-ins | 398 | 0.75% | |
| Total votes | 52,716 | 100.00% | ||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Chuck Grassley (Incumbent) | 78,819 | 99.72% | |
| Republican | Write-ins | 218 | 0.28% | |
| Total votes | 79,037 | 100.00% | ||
| Source | Ranking | As of |
|---|---|---|
| Sabato's Crystal Ball[2] | Safe R | November 1, 2004 |
| No. | Date | Host | Moderator | Link | Republican | Democratic |
|---|---|---|---|---|---|---|
| Key: P Participant A Absent N Not invited I Invited W Withdrawn | ||||||
| Chuck Grassley | Arthur A. Small | |||||
| 1 | Oct. 22, 2004 | Iowa Public Television | Dean Borg | C-SPAN | P | P |
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Republican | Chuck Grassley (Incumbent) | 1,038,175 | 70.18% | +1.77% | |
| Democratic | Arthur A. Small | 412,365 | 27.88% | −2.62% | |
| Libertarian | Christy Ann Welty | 15,218 | 1.03% | ||
| Green | Daryl A. Northrop | 11,121 | 0.75% | ||
| Socialist Workers | Edwin Fruit | 1,874 | 0.13% | −0.14% | |
| Write-ins | 475 | 0.03% | |||
| Majority | 625,810 | 42.31% | +4.39% | ||
| Turnout | 1,479,228 | ||||
| Republicanhold | Swing | ||||
Official campaign websites (archived)
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