Jefferson County, Montana
Jefferson County: County in Montana, United States
About
Jefferson County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 11,406 and a population density of 3 people per km². After 10 years in 2020 county had an estimated population of 12,360 inhabitants. Its county seat is Boulder. The county was created 159 years ago in 1865.
Quick Facts about Jefferson County
| Population : | 12,360 (2020) |
| Country : | United States of America |
| State : | Montana (United States) |
| Different from : | Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson Parish, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County |
| Area : | 4296 km2 |
| Water as percent of area : | 0.2% |
| Land as percent of area : | 99.8% |
| Named for : | Thomas Jefferson |
| Capital : | Boulder |
| Establishment : | February 02, 1865 |
| Time Zone : | America/Denver |
| Local time : | 05:35:48 (21st December 2024) |
| Density : | 3 Pop. per km² as of 2020 |
| Population growth : | 7.72% (2010-2020) |
Geography
Jefferson County is located at 46°8'55"N 112°5'37"W (46.1484900, -112.0937400). It has 3 neighbors: Madison County, Lewis and Clark County and Silver Bow County.
Jefferson County map
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The largest city of Jefferson County is Clancy with a population of 1,661. . See all Jefferson County cities & populated places.
Jefferson County Populated Places
Cities, towns, neighborhoods & other populated places in Jefferson County.
| City Name | Population | Title |
|---|---|---|
| Montana City | 2,715 | Census designated place |
| Clancy | 1,661 | Census designated place |
| Boulder | 1,291 | Town in Montana |
| Whitehall | 1,160 | Town in Jefferson County, Montana |
- Go to Official Website
- Go to Official Website
Official website of Jefferson County
Jefferson County has 3 neighbours.
- Madison County county in Montana, United States
- Lewis and Clark County county in Montana, United States
- Silver Bow County county in Montana, United States
- Boulder
Demographics
The population of Jefferson County increased by 7.72% in 10 years.
| Year | Population | % Change | Method |
| 2010 | 11,406 | - | census |
| 2011 | 11,375 | -0.27% | estimation process |
| 2012 | 11,318 | -0.5% | estimation process |
| 2013 | 11,455 | 1.2% | estimation process |
| 2014 | 11,502 | 0.41% | estimation process |
| 2015 | 11,572 | 0.6% | estimation process |
| 2016 | 11,779 | 1.76% | estimation process |
| 2017 | 11,921 | 1.19% | estimation process |
| 2018 | 12,094 | 1.43% | estimation process |
| 2019 | 12,221 | 1.04% | estimation process |
| 2020 | 12,360 | 1.12% | estimation process |
Comitatul Jefferson, Comte de Jefferson, Comté de Jefferson, Condado de Jefferson, Condado han Jefferson, Contea di Jefferson, Dzhefersun, Dzhefferson, Hrabstwo Jefferson, Jeferson srjan, Jefferson, Jefferson Kun, Jefferson Kūn, Jefferson konderria, Jefferson megye, Jeffersoni maakond, Okrug DZeferson, Quan Jefferson, Quận Jefferson, jefason jun, jepharasana ka'unti, jie fu xun xian, mqatʿt jyfyrswn, shhrstan jfrswn ayalt mwntana, Джеферсън, Джефферсон, Округ Џеферсон, Ջեֆերսոն շրջան, جیفرسن کاؤنٹی، مونٹانا, جیفرسن کاؤنٹی،مونٹانا, شهرستان جفرسون، ایالت مونتانا, مقاطعة جيفيرسون, জেফারশন কাউন্টি, ジェファーソン郡, 傑佛遜縣
People born in Jefferson County (1)
Montana legislator Terry Murphy was born in Jefferson County
Other places with the same name (25)
- Jefferson County , Kentucky county in Alabama, United States with a population of 767,452 people.
- Jefferson County , Alabama county in Alabama, United States with a population of 655,342 people.
- Jefferson County , Colorado county in Colorado, United States with a population of 583,283 people.
- Jefferson County , Texas county in Texas, United States with a population of 250,127 people.
- Jefferson County , Missouri county in Missouri, United States with a population of 226,543 people.
- Jefferson County , New York county in New York, United States with a population of 108,095 people.
- Jefferson County , Wisconsin county in Wisconsin, United States with a population of 85,038 people.
- Jefferson County , Arkansas county in Arkansas, United States with a population of 65,377 people.
- Jefferson County , Ohio county in Ohio, United States with a population of 64,939 people.
- Jefferson County , West Virginia county in West Virginia, United States with a population of 57,486 people.
- Jefferson County , Tennessee county in Tennessee, United States with a population of 55,307 people.
- Jefferson County , Pennsylvania county in Pennsylvania, United States with a population of 43,108 people.
- Jefferson County , Illinois county in Illinois, United States with a population of 37,235 people.
- Jefferson County , Washington county in the state of Washington, United States with a population of 32,700 people.
- Jefferson County , Indiana county in Indiana, United States with a population of 32,110 people.
- Jefferson County , Idaho county in Idaho, United States with a population of 29,871 people.
- Jefferson County , Oregon county in Oregon, United States with a population of 24,856 people.
- Jefferson County , Kansas county in Kansas, United States with a population of 19,032 people.
- Jefferson County , Iowa county in Iowa, United States with a population of 18,347 people.
- Jefferson County , Georgia county in Georgia, United States with a population of 15,267 people.
- Jefferson County , Florida county in Florida, United States of America with a population of 14,543 people.
- Jefferson County , Nebraska county in Nebraska, United States with a population of 7,099 people.
- Jefferson County , Mississippi county in Mississippi, United States with a population of 6,997 people.
- Jefferson County , Oklahoma county in Oklahoma, United States with a population of 5,949 people.
Montana Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Yellowstone County | 162,990 | County in Montana, United States of America |
| Missoula County | 121,630 | County in Montana, United States |
| Billings | 117,445 | The most populous city in Montana. |
| Gallatin County | 116,806 | County in Montana, United States |
| Flathead County | 105,851 | County in Montana, United States |
| Cascade County | 81,346 | County in central Montana, United States |
| Missoula | 76,848 | The most populous city in Missoula County, Montana. |
| Lewis and Clark County | 70,229 | County in Montana, United States |
| Great Falls | 58,353 | Town in Cascade County, Montana, United States |
| Bozeman | 50,970 | Town in Gallatin County, Montana, United States |
| Ravalli County | 45,002 | County in Montana, United States |
| Silver Bow County | 35,180 | County in Montana, United States |
| Butte | 34,190 | Consolidated city-county in Montana, United States |
| Helena | 33,737 | State capital of Montana, United States and seat of Lewis and Clark County |
| Lake County | 30,986 | County in Montana, United States |
| Kalispell | 25,329 | City in Flathead County, Montana, United States |
