Jefferson County, Montana
Historic newspapers, landmarks, and county history layers for genealogists and local historians.
At a glance
SummaryThe National Register of Historic Places includes 15 listed properties in the county, first listed in 1975. Most listings are in or near Boulder, Whitehall, Jefferson City.
Summary generated automatically from the source data on this page.
Newspapers
Library of CongressNewspaper directory data for Montana is not yet loaded on this site. Browse Jefferson titles at the Library of Congress.
National Register of Historic Places
NPS NRHP9 of 15 listings mapped; some locations are restricted by NPS to protect sensitive sites.
15 listed properties
| Property | City | Listed |
|---|---|---|
| Beavertown Historic District | Jefferson City | 2022 |
| Boulder Hot Springs Hotel | Boulder | 1979 |
| Child, W. C., Ranch | East Helena | 1977 |
| Fraternity Hall | Elkhorn | 1975 |
| Grant-Marshall Lime Kiln Historic District, The | Helena | 2017 |
| Hall Bungalow | Boulder | 2021 |
| Homestake Airway Beacon | Butte | 2019 |
| Jefferson Canyon Highway Historic District | Cardwell | 2018 |
| Jefferson County Courthouse | Boulder | 1980 |
| Lewis and Clark Caverns Historic District | LaHood | 2018 |
| MacHaffie Site (24JF4) | Montana City | 1986 |
| Modern Hotel | Whitehall | 2011 |
| Montana Deaf and Dumb Asylum | Boulder | 1985 |
| Montana State Training School Historic District | Boulder | 2014 |
| Whitetail Airway Beacon | Whitehall | 2020 |
Source: National Park Service, National Register of Historic Places. Property links open NRHP nomination files at the National Archives.
County formation
Newberry AHCBJefferson was formed in 1864 (1864-01-16) from unknown / original county.
JEFFERSON created by Idaho Territory from non-county area.
Source: Newberry Library, Atlas of Historical County Boundaries.
Population by decade
CensusJefferson County population from 1870 to 2020 (Census historical series).
| 1870 | 1880 | 1900 | 1920 | 1940 | 1950 | 1960 | 1980 | 2000 | 2020 |
|---|---|---|---|---|---|---|---|---|---|
| 1,531 | 2,464 | 5,330 | 5,203 | 4,664 | 4,014 | 4,297 | 7,029 | 10,049 | 12,085 |
Sources: U.S. Census Bureau historical county population (Forstall 1790–1990) and public-domain / CC0 county population series through 2020.
Cemeteries & historical places
USGS GNIS5 cemeteries and 5 historical populated places (ghost towns / former settlements) recorded in USGS GNIS for this county.
Cemeteries — 5 of 5 listed
| Name |
|---|
| Boulder Cemetery |
| Boulder Valley Cemetery |
| Fish Creek Cemetery |
| Old Whitehall Cemetery |
| Turner Cemetery |
Historical populated places — 5 of 5
| Name |
|---|
| Big Foot |
| Glenbeg |
| Lewiston |
| New Haven |
| Valley |
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 Jefferson County, Montana
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