Mahoning County, Ohio

Mahoning County
Mahoning County Courthouse
Mahoning County Courthouse
Flag of Mahoning County
Official seal of Mahoning County
Map of Ohio highlighting Mahoning County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Coordinates: 41°01′N 80°46′W / 41.02°N 80.77°W / 41.02; -80.77
Country United States
State Ohio
FoundedMarch 1, 1846
Named forA Native American word for salt lick
SeatYoungstown
Largest cityYoungstown
Area
 • Total425 sq mi (1,100 km2)
 • Land412 sq mi (1,070 km2)
 • Water14 sq mi (40 km2)  3.2%
Population
 (2020)
 • Total228,614
 • Estimate 
(2021)
226,762 Decrease
 • Density540/sq mi (210/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district6th
Websitewww.mahoningcountyoh.gov

Mahoning County is a county in the U.S. state of Ohio. As of the 2020 census, the population was 228,614.[1] Its county seat and largest city is Youngstown.[2] The county is named after the Mahoning River and was formed on March 1, 1846; the 83rd county in Ohio.[3][4]

Present-day Mahoning County was part of Trumbull and Columbiana counties until 1846, when the counties were redefined and Mahoning County was established as a new county.[5] Mahoning County is part of the Youngstown–Warren, OH Metropolitan Statistical Area.

  1. ^ "State & County QuickFacts". United States Census Bureau. Retrieved June 29, 2022.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. ^ "Ohio County Profiles: Mahoning County" (PDF). Ohio Department of Development. Archived from the original (PDF) on June 21, 2007. Retrieved April 28, 2007.
  4. ^ "Mahoning County - Ohio History Central". ohiohistorycentral.org. Retrieved January 17, 2023.
  5. ^ History of Mahoning County Archived February 22, 2015, at the Wayback Machine, Official county website.

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