a town in the state of Ohio, capital of the county of Washington, North America, is situated at the confluence of the Muskingum and the Ohio, 115 miles S.E. of Columbus, and stands in a plain, surrounded with beautiful and picturesque scenery. It is well and regularly built, being greatly adorned by the neat gardens with which many of the houses are surrounded. Marietta contains seven or eight churches, two public libraries, a college founded in 1835, and two excellent academies. Within the last eight or nine years several manufactories have been established here, which have added much to the importance of Marietta. This town is the oldest in the state, and was first settled in 1788 by a body of New England colonists under General Putnam. Pop. (1850) 3175, (1853) about 4000.