Washington County, Ohio

Washington County, Ohio
County	Washington County
State	Ohio
Founded	July 27, 1788
Seat	Marietta
Largest city	Marietta
Area total sq mi	640
Area land sq mi	635
Area water sq mi	4.6
Population as of	2020
Population total	59,771
Population density sq mi	94.1

Washington County, Ohio. Located in the Appalachian Ohio region, it is the oldest county in the state, established by the Ohio Company of Associates in 1788. The county seat and largest city is Marietta, the first permanent American settlement in the Northwest Territory. The county is named for George Washington and is known for its significant role in early American expansion and its rich historical heritage.

History

The region's history is deeply tied to the Indigenous cultures, including the Adena and Hopewell peoples, who constructed the Marietta Earthworks, a major ceremonial complex. Following the American Revolutionary War, the Congress of the Confederation enacted the Land Ordinance of 1785 and the Northwest Ordinance of 1787, paving the way for organized settlement. Pioneers led by Rufus Putnam and Manasseh Cutler established Marietta at the confluence of the Muskingum River and the Ohio River in 1788. The area was a focal point during the Northwest Indian War, with Fort Harmar and Campus Martius providing defense. In the 19th century, the county became a hub for Ohio River trade and shipbuilding, contributing to the War of 1812 and later steamboat traffic. The Underground Railroad was active here, with operatives like David Putnam Jr. aiding freedom seekers. The Marietta and Cincinnati Railroad later connected the region to broader markets, and the discovery of oil and gas in the late 1800s spurred further industrial growth.

Geography

According to the United States Census Bureau, the county has a total area of 640 square miles, of which 635 square miles is land and 4.6 square miles is water. It is situated in the Unglaciated Allegheny Plateau, characterized by rolling hills and narrow valleys. Major waterways include the Ohio River, which forms its eastern border with West Virginia, and the Muskingum River, which flows through Marietta. The county contains parts of Wayne National Forest and is home to several preserved historical sites like the Mound Cemetery. The geography has significantly influenced settlement patterns and economic activities, from early agriculture to resource extraction.

Demographics

As of the 2020 United States census, the population was 59,771. The Census Bureau reported a population density of 94.1 people per square mile. The racial makeup was predominantly non-Hispanic white, with smaller populations of African American, American Indian, Asian, and multiracial residents. The county has seen modest population changes over recent decades, with a slight decline since the mid-20th century following the peak of industrial manufacturing. The largest population center remains the Marietta micropolitan area.

Government

Washington County operates under a board of county commissioners. Other elected officials include the Auditor, Prosecutor, Sheriff, Treasurer, Recorder, and Engineer. The county is part of Ohio's 6th congressional district and is represented in the Ohio General Assembly within the Ohio Senate's 30th district and the Ohio House of Representatives' 94th district. The Washington County Courthouse, located in Marietta, is a historic building listed on the National Register of Historic Places.

Economy

Historically driven by agriculture, river trade, and oil and gas extraction, the county's economy has diversified. Major employers include the Marietta Memorial Hospital system, Washington State Community College, and several industrial facilities. Chemical production, anchored by companies like Solvay, has been significant since the mid-20th century. Tourism is an important sector, centered on historical attractions like the Campus Martius Museum, the Ohio River Museum, and the Marietta Earthworks. The county also benefits from its location along the Ohio River Scenic Byway and proximity to Wayne National Forest, supporting outdoor recreation.

Education

Primary and secondary education is provided by several public school districts, including the Marietta City Schools, Fort Frye Local School District, Warren Local School District, and Frontier Local School District. Washington State Community College, established in 1971, offers two-year degrees and vocational training. Higher education opportunities are also available through Marietta College, a private liberal arts institution founded in 1835, which is notable for its Petroleum engineering program. The county is served by the Washington County Public Library system.

Communities

*Cities: Marietta (county seat) *Villages: Barlow, Beverly, Lowell, Lower Salem, Macksburg *Townships: Adams, Aurelius, Barlow, Belpre, Decatur, Dunham, Fairfield, Fearing, Grandview, Independence, Lawrence, Liberty, Ludlow, Marietta, Muskingum, Newport, Palmer, Salem, Warren, Waterford, Watertown, Wesley *Census-designated places: Devola, Marietta East *Other unincorporated communities: Numerous small communities and historical locales are scattered throughout the townships.

Category:Washington County, Ohio Category:Ohio counties Category:1788 establishments in the Northwest Territory