Hamilton, Iowa — Presidential Election Results
Hamilton, Iowa has voted Republican in 6 of the last 7 presidential elections on record (2000–2024). It most recently flipped to Republican in 2012. In 2024, it was 20.2 pts more Rep. than Iowa overall.
Jump to year: 2000 · 2004 · 2008 · 2012 · 2016 · 2020 · 2024
Full Election History, 2000–2024
| Year | Winner | Party | Votes | Vote Share | Margin | Total Votes Cast | Swing | Vs. Iowa |
|---|---|---|---|---|---|---|---|---|
| 2000 | George W. Bush | Republican | 3,968 | 52.4% | 7.4 pts (561 votes) | 7,574 | — | 7.9 pts more Rep. |
| 2004 | George W. Bush | Republican | 4,367 | 52.4% | 5.7 pts (472 votes) | 8,335 | +1.9 pts | 5.0 pts more Rep. |
| 2008 | Barack Obama | Democratic | 4,018 | 49.7% | 1.3 pts (105 votes) | 8,078 | +7.0 pts | 8.4 pts more Rep. |
| 2012 | Mitt Romney | Republican | 3,991 | 50.3% | 2.6 pts (209 votes) | 7,927 | -4.0 pts | 8.6 pts more Rep. |
| 2016 | Donald Trump | Republican | 4,463 | 58.0% | 22.6 pts (1,737 votes) | 7,694 | -21.5 pts | 14.0 pts more Rep. |
| 2020 | Donald J Trump | Republican | 4,982 | 62.7% | 26.9 pts (2,139 votes) | 7,943 | -3.2 pts | 18.7 pts more Rep. |
| 2024 | Donald J Trump | Republican | 5,004 | 65.9% | 33.2 pts (2,522 votes) | 7,597 | -6.4 pts | 20.2 pts more Rep. |
Population Context
Total Census Bureau population estimate for the county that year, and recorded votes as a share of that total population. This is a population-based figure, not a turnout rate against eligible or registered voters, which this site does not calculate.
| Year | County Population | Votes Cast (% of Population) |
|---|---|---|
| 2000 | 16,423 | 46.1% of population |
| 2004 | 16,285 | 51.2% of population |
| 2008 | 15,863 | 50.9% of population |
| 2012 | 15,321 | 51.7% of population |
| 2016 | 15,075 | 51.0% of population |
| 2020 | 15,011 | 52.9% of population |
| 2024 | 14,856 | 51.1% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in Hamilton shifted 26.1 points toward the Republican candidate, based on recorded county returns. This reflects the vote totals in this dataset only; no claim is made here about the causes of that shift.
Margin Over Time
Democratic candidate's margin (percentage points, two-party vote share). Positive values favor the Democratic candidate; negative values favor the Republican candidate.
Bellwether Status
Hamilton has matched the national popular winner in 5 of the last 7 presidential elections (71%), and Iowa's own statewide winner in 5 of 7 (71%). Compare every county on the bellwether counties page.
Related Pages
Other Iowa Counties
Frequently Asked Questions
How has Hamilton voted in presidential elections since 2000?
Since 2000, Hamilton has voted Democratic in 1 of 7 recorded presidential elections and Republican in 6 of 7, based on county-level returns through 2024.
What was the closest presidential election in Hamilton?
Hamilton's closest recorded margin was in 2008, when Barack Obama (Democratic) won by 1.3 points (105 votes) out of 8,078 total votes cast.
Has Hamilton ever flipped between parties?
Yes. Hamilton changed which party won the county in: 2008, 2012, based on the 2000-2024 record on this page.
What is the largest presidential election margin recorded in Hamilton?
The widest margin on record for Hamilton was in 2024, when Donald J Trump (Republican) won by 33.7 points.
How many votes were cast in Hamilton relative to its population?
In 2024, 7,597 votes were recorded in Hamilton against a total population of 14,856 (51.1% of the total population). This is a population-based figure, not a turnout rate against eligible or registered voters, which this site does not calculate.
Is Hamilton a presidential bellwether county?
Hamilton has matched the national popular winner in 5 of the last 7 presidential elections (71%), and Iowa's own statewide winner in 5 of 7 (71%).