County record · fips 39107 · Ohio
MercerOH
Republican ×14 since 1972all 40 elections, 1868–2024
The Long Record
40 elections against the Ohio and national vote
2024 result
R+67.2
won by Republicans
Record since first cycle
20–20
Dem–Rep two-party wins
Voted with the winner
19/40
48% of its elections
Closest election
1960
D+0.0
this countyOhionational (official)dot colour = two-party winner · hollow = tie or unknown total · click a dot to open that election
The Biggest Swings
Cycle-over-cycle change in the two-party margin, in points
| Election | Swing | Toward |
|---|---|---|
| 1940 | -54.9 pts | Republicans |
| 1920 | -42.4 pts | Republicans |
| 1964 | +39.5 pts | Democrats |
| 1960 | +37.7 pts | Democrats |
| 1952 | -37.4 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
42,484
College (BA+)
22%
Median income
$76,782
2024 dollars
Non-white
6%
Rural
72%
Age 65+
19%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Adams, IN · Jay, IN · Auglaize, OH · Darke, OH · Van Wert, OH