This article lists the oldest extant buildings in North Dakota, including extant buildings and structures constructed prior to and during the United States rule over North Dakota. Only buildings built prior to 1880 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 Gingras Trading Post State Historic Site Walhalla, North Dakota 1844 Trading post Likely oldest buildings in North DakotaAntoine Blanc Gingras, Metis Fur Trader and member of the Minnesota Territorial Legislature, 1852–1853 Minnesota Historical Society, accessed December 6, 2010Kittson Trading Post Walhalla, North Dakota1852Trading PostFort Abercrombie GuardhouseAbercrombie, North Dakota1860FortDease-Martineau HousePembina County, North Dakota1868Residence/ Trading Post Headquarters Building (South Dakota) at Camp Hancock State Historic Site Bismarck, North Dakota 1872 Residence James Holes HouseFargo, North Dakota1879ResidenceOpheim CabinCooperstown, North Dakota1879ResidenceFirst permanent home in Griggs County (North Dakota) built by Omond Nelson Opheim, Washburn Township, 1879 (cabin now on courthouse grounds, Cooperstown)Thomas D. Campbell HouseGrand Forks, North Dakota1879Residence Bread of Life Church (South Dakota) at Camp Hancock State Historic Site Bismarck, North Dakota 1881 Church Oldest church building in North Dakota; no longer in active use by congregation; later St. George's Episcopal ChurchGriggs County CourthouseCooperstown, North Dakota1884CourthouseThe Griggs County Courthouse was designed by F.B. Edwards and built in 1884 by Alexander Moffat. A vault was added to the building in 1918 and a law enforcement center was added in 1960. It is the oldest courthouse still in use in North Dakota but the county is currently transitioning to a new courthouse.Old Stone ChurchBuffalo, North Dakota1885Church

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

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