Preble County, Ohio

Preble County
Preble County Courthouse
Location within the U.S. state of Ohio
Ohio's location within the U.S.
Coordinates: 39°44′N 84°39′W / 39.74°N 84.65°W / 39.74; -84.65
Country United States
State Ohio
FoundedMarch 1, 1808
Named afterEdward Preble
SeatEaton
Largest cityEaton
Area
  Total
426 sq mi (1,100 km2)
  Land424 sq mi (1,100 km2)
  Water2.3 sq mi (6 km2)  0.5%
Population
 (2020)
  Total
40,999
  Density96/sq mi (37/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district8th
Websitewww.prebco.org

Preble County (/ˈprɛbəl/ PREH-bəl) is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 40,999, down 3.0% from the 2010 census population of 42,270. Its county seat is Eaton. The county was formed on February 15, 1808, from portions of Butler and Montgomery Counties. It is named for Edward Preble, a naval officer who fought in the American Revolutionary War and against the Barbary Pirates.