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Ohio Counties

There is eighty-eight counties in the state of Ohio. Washington County the oldest in the state established on July 27, 1788. Noble County was formed on March 11, 1851 from portions of Guernsey, Morgan, Monroe and Washington counties. It was the last county to be formed in Ohio and, therefore, represents the youngest county in the state.

Mahoning County, Ohio

Mahoning County Education, Geography, and HistoryMahoning County, Ohio Courthouse

Mahoning County is a county located in the state of Ohio. Based on the 2010 census, the population was 238,823. Its county seat is Youngstown. The county is named for an Indian word meaning "salt lick". Mahoning County was formed on March 1, 1846; the 83rd county in Ohio. Until 1846, the area that is now Mahoning County was part of Trumbull and Columbiana counties, when the counties in the area were redefined and Mahoning County emerged as a new county.

Mahoning County is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.

Etymology - Origin of Mahoning County Name

Residents named the county after the Mahoning River. "Mahoning"is an Indian word meaning "salt licks."


County QuickFacts: CensusBureau Quick Facts

Mahoning County History

The Ohio government authorized the creation of Mahoning County on February 16, 1846. Residents named the county after the Mahoning River. "Mahoning"is an Indian word meaning "salt licks."

Mahoning County is located in the northeastern portion of Ohio, and it is in the heart of Appalachia. Its eastern border helps form Ohio's boundary with Pennsylvania. With only seven percent of the county's 415 square miles deemed to be urban, most residents live in rural areas. The county averages 621 people per square mile. The county's largest community and county seat is Youngstown, which had just over eighty-two thousand residents in 2000. Mahoning County has experienced a declining population in recent years, primarily due to the loss of employment opportunities in the county. In 2000, 257,555 people resided in the county, a decrease of almost three percent since 1990.

Service industries, such as health care, communications, and tourism, and retail positions are the two largest employers in Mahoning County. Farming is a distant sixth behind manufacturing, government, and financial positions. During the nineteenth and early twentieth centuries, coal mining and iron ore excavation were major employers in the county. In 1803, Daniel and James Heaton established the first iron blast furnace in Ohio. Today, Youngstown State University employs many residents. In 1999, the per capita income for Mahoning County residents was just over twenty-four thousand dollars. More than fourteen percent of the county's residents lived in poverty.

Most voters in Mahoning County claim to be independents, yet in recent years, they have overwhelmingly supported Democratic Party candidates at the national level.

Among Mahoning County's more prominent residents were Ohio Governor David Tod, President of the United States William McKinley, and songwriter Stephen Foster

Mahoning County, Ohio History Central, July 24, 2008,

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 425 square miles (1,100 km2), of which 412 square miles (1,070 km2) is land and 14 square miles (36 km2) (3.2%) is water

Neighboring Counties

Bordering counties are as follows:

  • Trumbull County (north)
  • Mercer County, Pennsylvania (northeast)
  • Lawrence County, Pennsylvania (east)
  • Columbiana County (south)
  • Stark County (southwest)
  • Portage County (northwest)


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