Mercer, Pennsylvania — Presidential Election Results
Mercer, Pennsylvania has voted Republican in 6 of the last 7 presidential elections on record (2000–2024). It most recently flipped to Republican in 2004. In 2024, it was 28.7 pts more Rep. than Pennsylvania 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. Pennsylvania |
|---|---|---|---|---|---|---|---|---|
| 2000 | Al Gore | Democratic | 23,817 | 48.9% | 1.4 pts (685 votes) | 48,725 | — | 2.8 pts more Rep. |
| 2004 | George W. Bush | Republican | 26,311 | 51.0% | 2.9 pts (1,480 votes) | 51,564 | -4.4 pts | 5.4 pts more Rep. |
| 2008 | John McCain | Republican | 26,565 | 49.4% | 0.3 pts (154 votes) | 53,796 | +2.6 pts | 10.7 pts more Rep. |
| 2012 | Mitt Romney | Republican | 25,925 | 51.0% | 3.3 pts (1,693 votes) | 50,863 | -3.1 pts | 8.8 pts more Rep. |
| 2016 | Donald Trump | Republican | 31,544 | 60.3% | 24.5 pts (12,811 votes) | 52,309 | -22.1 pts | 24.7 pts more Rep. |
| 2020 | Donald J Trump | Republican | 36,143 | 62.4% | 26.0 pts (15,076 votes) | 57,954 | -0.9 pts | 27.5 pts more Rep. |
| 2024 | Donald J Trump | Republican | 37,761 | 64.6% | 30.2 pts (17,616 votes) | 58,410 | -4.1 pts | 28.7 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 | 120,211 | 40.5% of population |
| 2004 | 119,113 | 43.3% of population |
| 2008 | 117,189 | 45.9% of population |
| 2012 | 115,637 | 44.0% of population |
| 2016 | 112,598 | 46.5% of population |
| 2020 | 110,548 | 52.4% of population |
| 2024 | 108,140 | 54.0% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in Mercer shifted 31.9 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
Mercer has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Pennsylvania's own statewide winner in 3 of 7 (43%). Compare every county on the bellwether counties page.
Related Pages
Other Pennsylvania Counties
Frequently Asked Questions
How has Mercer voted in presidential elections since 2000?
Since 2000, Mercer 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 Mercer?
Mercer's closest recorded margin was in 2008, when John McCain (Republican) won by 0.3 points (154 votes) out of 53,796 total votes cast.
Has Mercer ever flipped between parties?
Yes. Mercer changed which party won the county in: 2004, based on the 2000-2024 record on this page.
What is the largest presidential election margin recorded in Mercer?
The widest margin on record for Mercer was in 2024, when Donald J Trump (Republican) won by 30.4 points.
How many votes were cast in Mercer relative to its population?
In 2024, 58,410 votes were recorded in Mercer against a total population of 108,140 (54.0% 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 Mercer a presidential bellwether county?
Mercer has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Pennsylvania's own statewide winner in 3 of 7 (43%).