Voting & Elections in Mount Vernon, IL
Presidential election results and party lean trends
County-level data: Election results are reported at the county level. Mount Vernon is located in Jefferson County, IL. Results reflect all voters in the county, not just those in Mount Vernon.
Election Overview
Source: Jefferson County (2024)2024 Winner
Republican
Dem Votes
4,240
25.5%
GOP Votes
12,189
73.3%
Total Votes
16,639
Margin
R+47.8%
Shift from 2020
R+2.7pp
vs prior election
📊Election Results by Year
2016–2024📈Partisan Lean Trend
R+47.8%Election History
Source: County-Level Election Results| Year | Dem Votes | GOP Votes | Total | Dem % | GOP % | Margin |
|---|---|---|---|---|---|---|
| 2024 | 4,240 | 12,189 | 16,639 | 25.5% | 73.3% | R+47.8 |
| 2020 | 4,608 | 12,476 | 17,436 | 26.4% | 71.5% | R+45.1 |
| 2016 | 4,408 | 11,681 | 16,818 | 26.2% | 69.5% | R+43.2 |
In the 2024 presidential election, Jefferson County recorded 16,639 total votes. Republicans won the county with 73.3% of the vote compared to 25.5% for Democrats, a margin of R+47.8%. Compared to 2020, the margin shifted R+2.7pp from the previous election. Since 2016, Jefferson County has shifted 4.5 percentage points toward Republicans.