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Marietta is a city in southeastern Ohio and the county seat of Washington County, located where the Muskingum River meets the Ohio River.

Marietta was founded on April 7, 1788, when 48 men of the Ohio Company of Associates led by General Rufus Putnam landed at the confluence of the Muskingum and Ohio rivers, establishing the first permanent American settlement in the Northwest Territory.

Marietta was named in honor of Marie Antoinette, the Queen of France, in gratitude for French support of the American colonies during the Revolution.

Marietta is older than Ohio itself — it was settled in 1788, a full 15 years before Ohio became a state in 1803.

Marietta was incorporated as a town in 1800 and chartered as a city in 1852.

The population of Marietta was 13,385 at the 2020 census.

Marietta has around 5,893 households, but only about 56% of its homes are owner-occupied, reflecting its large student and renter population.

Marietta College, chartered in 1835, is a private liberal arts college in the city, and Washington State Community College also serves Marietta.

The Campus Martius Museum stands on the site of the settlers' original 1788 fortification and preserves Rufus Putnam's land office, considered the oldest building in Ohio.

Marietta's Mound Cemetery preserves part of the Marietta Earthworks, a Hopewell-culture ceremonial complex more than 1,500 years old that includes the Great Mound.