Jefferson County, Montana
Jefferson County, Montana · ZIP 59631, 59632, 59634
- Census data · ACS 2019-2023
- 13,304 (2024 estimate)Population
- 4,890Households
- $76,576Median household income
- $408,000Median home value
- 10Towns with a page
- 9ZIP codes
Jefferson County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 10,049 |
| 2010 | 11,406 |
| 2020 | 12,085 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 30, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 30, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 30, retrieved November 14, 2026.
Median household income $76,576 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 30, retrieved November 14, 2026.
- Owner occupied
- 4,065 units
- Renter occupied
- 825 units
- Vacancy rate
- 9.2%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 30, retrieved November 14, 2026.
1,959 employees in 342 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 30, retrieved November 14, 2026.
| Measure | Jefferson County | Montana |
|---|---|---|
| Population | 12,501 | 1,105,072 |
| Median household income | $76,576 | $69,922 |
| Median age | 47.3 | 40.2 |
| Median home value | $408,000 | $338,100 |
| Bachelor’s degree or higher | 32.7% | 34.5% |
| Foreign-born residents | 2.2% | 2.3% |
| Owner-occupied homes | 83.1% | 69.4% |
| Mean commute to work | 22.3 minutes | 19.2 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 30, retrieved November 14, 2026.
Townships, towns and villages in Jefferson County10 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Montana City | Census designated place | 2,899 | 34.1 sq mi |
| Clancy | Census designated place | 1,729 | 39.2 sq mi |
| Boulder | City | 1,305 | 1.12 sq mi |
| Whitehall | Town | 1,116 | 0.71 sq mi |
| South Hills | Census designated place | 634 | 5.87 sq mi |
| Jefferson City | Census designated place | 446 | 23.2 sq mi |
| Rader Creek | Census designated place | 373 | 20.3 sq mi |
| Basin | Census designated place | 360 | 12.7 sq mi |
| Elkhorn | Census designated place | 49 | 6.74 sq mi |
| Cardwell | Census designated place | 43 | 2.15 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 30 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across Jefferson County
No job is posted in Jefferson County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in Jefferson County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Broadwater CountyPopulation 8,302 (2024 estimate)
- Deer Lodge CountyPopulation 9,811 (2024 estimate)
- Gallatin CountyPopulation 126,984 (2024 estimate)
- Lewis and Clark CountyPopulation 75,129 (2024 estimate)
- Madison CountyPopulation 9,753 (2024 estimate)
- Powell CountyPopulation 7,120 (2024 estimate)
- Silver Bow CountyPopulation 36,134 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 30, retrieved November 14, 2026.