Big Horn County , Montana

Big Horn County: County in southeastern Montana, United States

Big Horn County locator map
Location of Big Horn County on Montana map.


Big Horn County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 12,865 and a population density of 1 people per km². After 10 years in 2020 county had an estimated population of 13,063 inhabitants. Its county seat is Hardin. The county was created 108 years ago in 1912.

Hotel Becker 'Hardin  Montana' 001 image
Hotel Becker 'Hardin Montana' 001
Hotel Becker 'Hardin  Montana' 001 image


Big Horn County is located at 45°25'24"N 107°29'23"W (45.4234600, -107.4897000). It has 4 neighbors: Treasure County, Yellowstone County, Big Horn County and Sheridan County.

Big Horn County map

The largest city of Big Horn County is Hardin with a population of 3,705. . See all Big Horn County cities & populated places.


Big Horn County forecast: A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 50%. more

Big Horn County Quick Facts

Population : 13,063 (2020)
Country : United States of America
State : Montana (United States)
Different from : Big Horn County
Area : 12998 km2
Water as percent of area : 0.4%
Land as percent of area : 99.6%
Named for : Bighorn sheep
Altitude : 3,468 feet / 1057 meters
Capital : Hardin
Establishment : January 01, 1913
Time Zone : America/Denver
Local time : 17:49:22 (26th October 2021)
Density : 1 Pop. per km² as of 2020
Population growth : 1.52% (2010-2020)
Weather : 42℉ Chance Light Rain 7-days weather

Big Horn County has 4 neighbours.

  • Hardin


The population of Big Horn County increased by 1.52% in 10 years.

Year Population % Change Method
2010 12,865 - census
2011 13,056 1.46% estimation process
2012 12,995 -0.47% estimation process
2013 13,117 0.93% estimation process
2014 13,343 1.69% estimation process
2015 13,312 -0.23% estimation process
2016 13,458 1.08% estimation process
2017 13,483 0.19% estimation process
2018 13,365 -0.88% estimation process
2019 13,319 -0.35% estimation process
2020 13,063 -1.96% estimation process

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Other places with the same name (2)

Big Horn County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Big Horn County.

City Name Population Title
Hardin 3,705 City in Big Horn County, Montana, United States of America
Crow Agency 1,616 Census designated place
Lodge Grass 442 Town of the United States

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
Gallatin County 116,806 County in Montana, United States
Billings 109,736 City in Montana, United States of America
Flathead County 105,851 County in Montana, United States
Cascade County 81,346 County in central Montana, United States
Missoula 76,848 County seat of Missoula County, Montana, United States
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