Unionville, Washington County, Ohio

Oak Grove is an unincorporated community in Washington County, in the U.S. state of Ohio.The Oak Grove Volunteer Fire Department has served the community since the 1950s.

Marietta High School (MHS) is a four-year, public, secondary school in Marietta, Ohio, United States. The school serves students in the Marietta City School District in grades nine through twelve. As of 2021–2021, the enrollment was approximately 1,100. Marietta's mascot is Tabby the tiger and its colors are orange and black. The school participates in both the Ohio Valley Athletic Conference and Twin State League. MHS is accredited by the North Central Association of Colleges and Secondary Schools and the Ohio Department of Education.

Indian Run is a stream in the U.S. state of Ohio. It is a tributary to the Muskingum River. According to tradition, Indian Run was named from an incident when an American Indian went missing from his party after having boasted of the killing of a white pioneer settler.

Devola is a census-designated place (CDP) in Washington County, Ohio, United States, along the Muskingum River. It is part of the Parkersburg-Marietta-Vienna, WV-OH Metropolitan Statistical Area. The population was 2,639 at the 2020 census.

Muskingum Township is one of the twenty-two townships of Washington County, Ohio, United States. The 2020 census found 4,424 people in the township.

The Basilica of St. Mary of the Assumption is a Minor Basilica of the Catholic Church located in Marietta, Ohio, United States. It is also a parish church of the Diocese of Steubenville.

Campus Martius was a defensive fortification at the Marietta, Ohio settlement, and was home to Rufus Putnam, Benjamin Tupper, Arthur St. Clair, and other pioneers from the Ohio Company of Associates during the Northwest Indian War. Major Anselm Tupper was commander of the Campus Martius during the war. Construction began in 1788 and was fully completed in 1791. The Campus Martius was located on the east side of the Muskingum River, and upriver from its confluence with the Ohio River. A firsthand description of the fort is provided in Hildreth's Pioneer History, Campus Martius is the handsomest pile of buildings on this side of the Alleghany mountains, and in a few days will be the strongest fortification in the territory of the United States. It stands on the margin of the elevated plain on which are the remains of the ancient works [mounds], mentioned in my letter of May last, thirty feet above the high bank of the Muskingum, twenty-nine perches distant from the river, and two hundred and seventy-six from the Ohio. It consists of a regular square, having a block house at each angle, eighteen feet square on the ground, and two stories high; the upper story on the outside or face, jutting over the lower one, eighteen inches. These block houses serve as bastions to a regular fortification of four sides. The curtains are composed of dwelling houses two stories high, eighteen feet wide, and of different lengths. The Campus Martius site is now occupied by the Campus Martius Museum. The Rufus Putnam House, part of the original Campus, is enclosed in the museum. Campus Martius was located around 39°25′17″N 81°27′40″W.

The Campus Martius Museum interprets Ohio history. Campus Martius was the second fortification in Marietta, Ohio and the first primarily for civilian defense. The Rufus Putnam House, incorporated in the Museum, is the only remaining part of the fortification. The museum also includes the Ohio Company Land Office. Both are National Register of Historic Places properties. The museum is located a block from the Ohio River Museum.

The Ohio Company Land Office is one of the original buildings of the city of Marietta, Ohio, United States. The Office is listed individually in the National Register of Historic Places and as a contributing property to the Marietta Historic District. The Land Office was built after Ohio Company of Associates landed at Marietta in 1788. The Office was built at approximately 39°25′16.75″N 81°27′47.25″W. In 1791 the building was moved away from the Muskingum River so it could be protected by the guns of Campus Martius. From this location, Ohio Company surveyors plotted the company's entire purchase in southeastern Ohio, more than 900,000 acres (360,000 ha) in total, under the direction of Rufus Putnam as the company's chief. The building is a simple log structure with a gabled roof, pierced by a single chimney; one window is set into the side, and the front has space for just one window and the main entrance. Its location on a slope permits the slight exposure of the foundation on one side. Smaller elements include shutters for the windows and a pair of steps that provide access to the main entrance. As the oldest extant building anywhere in Ohio, the land office had become the focus of significant attention by the opening years of the twentieth century, with organizations such as Marietta's historical society devoting extensive effort to ensure its preservation.The building is now part of the Campus Martius Museum complex.

The Rufus Putnam House, also known as Campus Martius or Campus Martius Museum State Memorial, is a historic building in Marietta, Ohio. It was built as part of the Campus Martius fortification by General Rufus Putnam, during the early settlement of Ohio by the Ohio Company of Associates.The building is listed in the National Register of Historic Places individually, and it is also a contributing property of the Marietta Historic District. The building is the only surviving part of the Campus Martius fortification and has been enclosed inside the Campus Martius Museum building.The house has been called "the most outstanding architectural combination of New England tradition and frontier necessity preserved in Ohio today."

The Castle is a historic Gothic Revival style home in Marietta, Ohio, USA.Since 1994 it has been operated as museum.

Washington State Community College (WSCC) is a public community college in Marietta, Ohio. It was established in 1971 as Washington Technical College and moved to its current location in 1991.