This article lists the oldest extant buildings in Ohio, including extant buildings and structures constructed prior to and during the United States rule over Ohio. Only buildings built prior to 1830 are suitable for inclusion on this list, or the building must be the oldest of its type.

In order to qualify for the list, a structure must: be a recognizable building (defined as any human-made structure used or intended for supporting or sheltering any use or continuous occupancy); incorporate features of building work from the claimed date to at least in height and/or be a listed building.

This consciously excludes ruins of limited height, roads and statues. Bridges may be included if they otherwise fulfill the above criteria. Dates for many of the oldest structures have been arrived at by radiocarbon dating or dendrochronology and should be considered approximate. If the exact year of initial construction is estimated, it will be shown as a range of dates.

List of oldest buildings

BuildingImage Location First built UseNotes Old Stone Fort (Cushocton, Ohio) Coshocton, Ohio ca. 1679-1700s Unknown Believed to have been built by "d’ Iberville, LaSalle’s successor who built French forts in the Mississippi Valley from 1679- 1689. It’s also believed that this French Canadian built the fort to guard against the English in the battle of the fur trades.""What’s the Story of the Old Stone Fort near Coshocton Ohio?" https://travelinspiredliving.com/old-stone-fort-shrouded-mystery-coshocton-county/ Another theory is "it was actually built in the 1700s by Irishman George Croghan as a fur trading post."Coshocton agencies trying to preserve Old Stone Fort, Leonard L. Hayhurst Coshocton Tribune Sept. 9, 2021https://www.coshoctontribune.com/story/news/local/2021/09/09/coshocton-agencies-trying-preserve-old-stone-fort/5680141001/ Rufus Putnam HouseMarietta, Ohio1788Residential Now part of the Campus Martius museum Ohio Company Land Office building Marietta, Ohio 1788 Business Now part of the Campus Martius museum"Oldest standing building in Ohio gives peek into history" Parkersburg News and Sentinel, October 4, 2014 https://www.newsandsentinel.com/news/local-news/2014/10/oldest-standing-building-in-ohio-gives-peek-into-history/#:~:text=Built%20in%201788%2C%20and%20added,building%20in%20the%20entire%20state. Newcom Tavern Dayton, Ohio 1796 Tavern Oldest building in Dayton"A look inside Blush Studio -- the oldest building in Dayton" by Tom Gilliam, Dec. 5, 2016https://www.dayton.com/news/special-reports/look-inside-blush-studio-the-oldest-building-dayton/UDtKKYLBC8za5CZamCMQuN/ Unionville Tavern Unionville, Ohio 1798 Tavern Abandoned tavern, one of oldest buildings in state"This Abandoned Tavern Is One Of The Oldest Buildings In The Midwest" April 18, 2017 https://www.onlyinyourstate.com/ohio/tavern-midwest-usa/Galloway Log HouseXenia, Ohio1799Residencelargely rebuilt after 1974 tornadohttps://www.reisendesign.com/galloway-log-cabin (accessed 7/2/24)Captain Jonathan Stone HouseBelpre, Ohio1799ResidenceFederal Land Office (Steubenville, Ohio)Steubenville, Ohio1801GovernmentEstablished by Harrison Land Act of 1800 Ohio's Oldest Brick Building Lisbon, Ohio 1803 Commercial Often alleged to be Ohio's oldest brick building; built by Picking family, Edwin Stanton practiced law upstairs in building. Betts House (Cincinnati, Ohio) Cincinnati, Ohio 1804 Residential Oldest building in Cincinnati Benjamin Iddings Log House Miami County, Ohio 1804 Residential Oldest building in Miami County"The Iddings Log House" by Joan c. Heidelberg, in History of Miami County, Ohio, edited by E. Irene Miller, 1982, p. 316.Old Stone Tavern (Poland, Ohio) Poland, Ohio1804TavernOldest remaining building in Poland. William McKinley enlisted in the Union Army on its front porch in 1861. Franklinton Post Office Columbus, Ohio 1807 Post office Oldest building in ColumbusNational Register of Historic Places Registration Form". National Park Service. Retrieved May 20, 2020. Overfield Tavern Troy, Ohio 1808 Tavern Oldest building in Troyhttps://www.wdtn.com/news/local-news/oldest-building-in-troy-suffers-severe-damage-from-fire/ West Union Presbyterian Church West Union, Ohio 1810 Church Oldest active church building in OhioScouller, James B. A Manual of the United Presbyterian Church of North America 1751-1881. Harrisburg: Patriot, 1881, 146. Dunham Tavern Cleveland, Ohio 1824 Tavern Oldest building in Cleveland"Visit the Oldest Building in Cleveland, Ohio"Laura Dorwart 1 May 2018 https://theculturetrip.com/north-america/usa/ohio/articles/visit-the-oldest-building-in-cleveland-ohio/ Petersburg Mill Petersburg, Carroll County, Ohio 1826 Water mill Built in 1826 to replace an 1818 watermill.

See also National Register of Historic Places listings in Ohio History of Ohio Oldest buildings in the United States

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