This article lists the oldest extant buildings in Washington (state), including extant buildings and structures constructed prior to and during the United States rule over Washington. Only buildings built prior to 1860 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:
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.
| Building | Image | Location | First built | Use | Notes |
|---|---|---|---|---|---|
| The Prince's Cabin | Frenchtown, Washington | 1837 | Fur Trader cabin | Hudson's Bay Company fur trader's log cabin moved to current historical site from a Cayuse wintering location.[1] | |
| Granary at Fort Nisqually | Tacoma, Washington | 1843 | Trading Post granary | Hudson's Bay Company[2] | |
| Covington House | Vancouver, Washington | 1848 | Residence | ||
| Grant House | Vancouver, Washington | 1850 | Residence | ||
| John R. Jackson House | Lewis County, Washington | 1850 | Residence | Oldest building in the state used as a courthouse; also known as Jackson Courthouse | |
| Miles Weston House | Steilacoom, Washington | 1852-53 | Residence | Oldest house in Steilacoom[3] | |
| Daniel R. Bigelow House | Olympia, Washington | 1854 | Residence | Oldest house in Olympia | |
| Judge Columbia Lancaster House | Ridgefield, Washington | 1850–1855 | Residence | ||
| Factor's House at Fort Nisqually | Tacoma, Washington | 1855 | Trading Post | Hudson's Bay Company[4] | |
| Steilacoom Catholic Church | Steilacoom, Washington | 1855 | Church | Oldest Catholic church in Washington; Moved to present location in 1864. | |
| Cape Disappointment Light | Ilwaco, Washington | 1856 | Lighthouse | First lighthouse lit in the state | |
| Pickett House | Bellingham, Washington | 1856 | Residence | Oldest house in Bellingham | |
| Cape Flattery Light | Neah Bay, Washington | 1857 | Lighthouse | ||
| Claquato Church | Chehalis, Washington | 1857 | Church | Oldest church building on original foundation[5] | |
| Joseph Borst House | Centralia, Washington | 1857 | Residence | ||
| New Dungeness Light Station | Sequim, Washington | 1857 | Lighthouse | ||
| Davidson House | Steilacoom, Washington | 1858 | Residence | ||
| T. G. Richards and Company Store | Bellingham, Washington | 1858 | Commercial | Oldest brick building in the state built with brick from San Francisco | |
| Colonel Granville & Henrietta Haller House | Coupeville, Washington | 1859 | Residence | Original portion of the house is the originally separate Brunn House | |
| O. B. McFadden House | Chehalis, Washington | 1859 | Residence | Oldest house in Chehalis | |
| J. F. Strong House | Spokane, Washington | 1879 | Residence | One of oldest buildings in Spokane | |
| Ward House | Seattle, Washington | 1882 | Residence | One of oldest buildings in Seattle | |