Washington County, Idaho
Historic newspapers, landmarks, and county history layers for genealogists and local historians.
At a glance
SummaryThe National Register of Historic Places includes 31 listed properties in the county, first listed in 1976. Most listings are in or near Weiser, Cambridge.
Summary generated automatically from the source data on this page.
Newspapers
Library of CongressNewspaper directory data for Idaho is not yet loaded on this site. Browse Washington titles at the Library of Congress.
National Register of Historic Places
NPS NRHP26 of 31 listings mapped; some locations are restricted by NPS to protect sensitive sites.
31 listed properties
Source: National Park Service, National Register of Historic Places. Property links open NRHP nomination files at the National Archives.
County formation
Newberry AHCBWashington was formed in 1879 (1879-02-20) from Ada, Boise.
WASHINGTON created by Idaho Territory from ADA and BOISE.
Source: Newberry Library, Atlas of Historical County Boundaries.
Population by decade
CensusWashington County population from 1880 to 2020 (Census historical series).
| 1880 | 1900 | 1920 | 1940 | 1950 | 1960 | 1980 | 2000 | 2020 |
|---|---|---|---|---|---|---|---|---|
| 879 | 6,882 | 9,424 | 8,853 | 8,576 | 8,378 | 8,803 | 9,977 | 10,500 |
Sources: U.S. Census Bureau historical county population (Forstall 1790–1990) and public-domain / CC0 county population series through 2020.
National Park Service sites nearby
NPSPark units within about 40 km of the county centroid (from NPS Public POIs; no API key).
| Site | Type | Dist. |
|---|---|---|
| Minidoka Internment National Monument | Park unit | 27.9 km |
Source: NPS National Datasets / Public POIs. The NPS Developer API requires a free key and was not used.
Cemeteries & historical places
USGS GNIS4 cemeteries and 2 historical populated places (ghost towns / former settlements) recorded in USGS GNIS for this county.
Cemeteries — 4 of 4 listed
| Name |
|---|
| Eastside Cemetery |
| Galloway Cemetery |
| Keithley Creek Cemetery |
| Mann Creek Cemetery |
Historical populated places — 2 of 2
| Name |
|---|
| Crane |
| Heath |
Source: USGS Geographic Names Information System (public domain). Cemeteries from the 2021 NationalFile archive; historical places from GNIS HistoricalFeatures topical extract.
Historical markers
HMdb linkMarker text and photos from the Historical Marker Database (HMdb) are not embedded here. HMdb allows non-commercial reuse with attribution, but commercial/compensated use needs written permission; this is a commercial site, so we only link out.
Search HMdb for Washington County, Idaho
Terms: hmdb.org/copyright.asp. Linking is encouraged by HMdb.