Butler County, Ohio

county in Ohio, United States

Butler County is a county in the U.S. state of Ohio. In 2020, 390,357 people lived there.[2] The county seat is Hamilton.

Butler County
Butler County Courthouse
Butler County Courthouse
Official seal of Butler County
Map of Ohio highlighting Butler County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Coordinates: 39°26′N 84°35′W / 39.44°N 84.58°W / 39.44; -84.58
Country United States
State Ohio
FoundedMay 1, 1803[1]
Named forGeneral Richard Butler
Largest cityHamilton
 • Total470 sq mi (1,200 km2)
 • Land467 sq mi (1,210 km2)
 • Water3.1 sq mi (8 km2)  0.7%
 • Total390,357
 • Density830/sq mi (320/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district8th


  1. "Ohio County Profiles: Butler County" (PDF). Ohio Department of Development. Archived from the original (PDF) on June 21, 2007. Retrieved April 28, 2007.
  2. "QuickFacts: Butler County, Ohio". United States Census Bureau. Retrieved January 18, 2024.