Here's a list of the oldest known building in each of the 50 U.S. states. These buildings range from indigenous structures and colonial homes to mission churches, reflecting each state's unique history.
1. Alabama:
Joel Eddins House – Built in 1810 in Ardmore, this log cabin is a rare example of frontier architecture.
2. Alaska:
Baranov Museum – Also known as the Russian-American Magazin, this building was constructed in 1808 in Kodiak during Russian rule.
3. Arizona:
San Xavier del Bac Mission – Completed in 1797 near Tucson, it's a stunning example of Spanish Colonial architecture.
4. Arkansas:
Jacob Wolf House – Built in 1829 in Norfork, this two-story log cabin served as a courthouse.
5. California:
Mission San Juan Capistrano – Founded in 1776 in Orange County, this mission is famed for its "return of the swallows."
6. Colorado:
Four Mile House – Built in 1859 near Denver, this stagecoach stop is the city's oldest standing structure.
7. Connecticut:
Henry Whitfield House – Constructed in 1639 in Guilford, it's the oldest stone house in New England.
8. Delaware:
Ryves Holt House – Built in 1665 in Lewes, this is the state's oldest standing building.
9. Florida:
Castillo de San Marcos – Completed in 1695 in St. Augustine, this Spanish fortress is the oldest masonry fort in the continental U.S.
10. Georgia:
Horton House – Built in 1743 on Jekyll Island, it’s one of the oldest tabby concrete structures in Georgia.
11. Hawaii:
Puʻuhonua o Hōnaunau – A sacred site with structures dating back to the 16th century, located on the Big Island.
12. Idaho:
Mission of the Sacred Heart (Cataldo Mission) – Completed in 1853, it’s the oldest standing building in Idaho, located near Cataldo.
13. Illinois:
Cahokia Courthouse – A French colonial building from around 1740, originally located in Cahokia.
14. Indiana:
Brouillet House – Constructed in 1806 in Vincennes, it’s among the state's oldest structures.
15. Iowa:
Louis Arriandeaux Log House – Built in 1827 in Dubuque, this log cabin is the oldest standing building in Iowa.
16. Kansas:
Rookery Building – Located in Fort Leavenworth, it was constructed in 1827 and is Kansas' oldest standing building.
17. Kentucky:
Abraham Lincoln Birthplace Cabin – Though not original, this replica cabin in Hodgenville symbolizes Lincoln's early years, with the site dating to the early 19th century.
18. Louisiana:
Ursuline Convent – Completed in 1752 in New Orleans, it’s the oldest surviving building in the Mississippi River Valley.
19. Maine:
McIntire Garrison House – A fort-style house in York, built in 1707.
20. Maryland:
Old Trinity Church – Built in 1675 in Church Creek, this Anglican church is one of the oldest in continuous use in America.
21. Massachusetts:
Fairbanks House – Built in 1637 in Dedham, it’s the oldest timber-frame house in North America.
22. Michigan:
Fort Mackinac – Constructed in 1780 on Mackinac Island by British forces, it’s Michigan’s oldest military outpost.
23. Minnesota:
Sibley House – Built in 1836 by Henry Hastings Sibley, Minnesota’s first governor, it stands in Mendota.
24. Mississippi:
LaPointe-Krebs House – Built in 1757 in Pascagoula, it’s the oldest structure in Mississippi.
25. Missouri:
Louis Bolduc House – Constructed in 1792 in Ste. Genevieve, this French Colonial house represents early Missouri architecture.
26. Montana:
Fort Connah – Established in 1846 by the Hudson's Bay Company, it's Montana’s oldest building.
27. Nebraska:
Bellevue Log Cabin – Built around 1830, this cabin is associated with the early days of Nebraska’s settlement.
28. Nevada:
Mormon Station – Built in 1851 in Genoa, it’s Nevada’s oldest non-Indigenous structure.
29. New Hampshire:
Richard Jackson House – Built in 1664 in Portsmouth, this is the oldest house in the state.
30. New Jersey:
Nothnagle Log House – Dating to around 1638, this log cabin in Gibbstown is one of the oldest in the U.S.
31. New Mexico:
Taos Pueblo – Continuously inhabited for over 1,000 years, this Native American structure is made of adobe and still stands today.
32. New York:
Wyckoff House – Built in 1652 in Brooklyn, it’s New York’s oldest surviving building.
33. North Carolina:
Lane House – Constructed around 1713, this house in Bath is North Carolina’s oldest documented building.
34. North Dakota:
Kittson Trading Post – Built in 1852 in Walhalla, this trading post is one of the oldest buildings in the state.
35. Ohio:
The Old Stone House – Built in 1804, it’s a preserved pioneer house in Cleveland.
36. Oklahoma:
Fort Gibson Stockade – Originally constructed in 1824, the current stockade has been reconstructed but the site remains historical.
37. Oregon:
Hudson's Bay Company Fort Vancouver – Built in 1825 near Portland, it’s a significant historical site.
38. Pennsylvania:
Lower Swedish Cabin – Constructed around 1640 in Drexel Hill, it’s one of the oldest log cabins in the U.S.
39. Rhode Island:
White Horse Tavern – Established in 1673 in Newport, it’s the oldest operating tavern in America.
40. South Carolina:
Middleburg Plantation – Built in 1699 in Huger, it’s the state’s oldest wooden plantation house.
41. South Dakota:
Fort Pierre Chouteau Site – Established in 1832, this fur trading post is the oldest documented structure in the state.
42. Tennessee:
Carter Mansion – Completed in 1781 in Elizabethton, it’s the oldest frame house in Tennessee.
43. Texas:
Mission Concepción – Finished in 1755, this San Antonio mission is the best-preserved of Texas’ Spanish colonial buildings.
44. Utah:
Old Fort Douglas – Constructed in 1862, it’s one of the oldest surviving structures in the Salt Lake Valley.
45. Vermont:
Old Constitution House – Built in 1772 in Windsor, it’s where the constitution of Vermont was signed in 1777.
46. Virginia:
Jamestown Church Tower – Dating back to 1639, this church tower is one of the few remnants from the original Jamestown settlement.
47. Washington:
Fort Nisqually Granary – Built in 1843 near Tacoma, it’s one of Washington’s oldest structures.
48. West Virginia:
The Old Stone House – Built in 1780 in Lewisburg, it’s the state’s oldest remaining structure.
49. Wisconsin:
Astor Fur Warehouse – Built in 1836 in Green Bay, it’s the oldest structure in Wisconsin.
50. Wyoming:
Old Bedlam – Built in 1849 at Fort Laramie, it’s Wyoming’s oldest standing military building.
These buildings reflect the varied and rich history of the U.S., from Indigenous and colonial heritage to early settlement and military establishments.