What is the population of Big Horn County?

The population of Big Horn County, MT is 13,063.

Where is Big Horn County located?

Big Horn County, MT is located at latitude 45.4234600 and longitude -107.4897000. It is in United States.

What is the area of Big Horn County?

The area of Big Horn County, MT is 12998 km².

What is the elevation of Big Horn County?

Big Horn County, MT has an elevation of 1049 meters (3442 feet) above sea level.

What time zone is Big Horn County in?

Big Horn County, MT is in the America/Denver time zone.

How has the population of Big Horn County changed?

The population of Big Horn County, MT has increased from 12,865 (2010) to 13,063 (2020), a change of 1.5%.

Big Horn County, Montana

Big Horn County: county in southeastern Montana, United States

About

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 113 years ago in 1912.

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

County Snapshot

Big Horn County at a glance

Big Horn County currently has 3 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Montana counties

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Largest city

Hardin

Population 3,705

Quick Facts about Big Horn County

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%
Latitude & Longitude	45.4235,-107.4897
Named for	Bighorn sheep
Altitude	3,468 feet / 1057 meters
Capital	Hardin
Establishment	January 01, 1913
Time Zone	America/Denver
Local time	15:19:07 (18th April 2026)
Density	1 Pop. per km² as of 2020
Population growth	1.52% (2010-2020)
Weather	28℉ Chance Snow Showers then Mostly Cloudy 7-days weather

Hotel Becker 'Hardin Montana' 001 image

Geography

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

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The largest city of Big Horn County is Hardin with a population of 3,705. Other cities include and Lodge Grass population 442. See all Big Horn County cities & populated places.

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

Weather

28°F

Chance Snow Showers then Mostly Cloudy

7 to 16 mph W Friday Night

A chance of snow showers before midnight. Mostly cloudy, with a low around 28. West wind 7 to 16 mph. Chance of precipitation is 30%.

7-Day Forecast

Official website of Big Horn County

Official Website

Big Horn County has 4 neighbours.

Treasure County county in Montana, United States
Yellowstone County county in Montana, United States of America
Big Horn County county in northern Wyoming, United States
Sheridan County county in Wyoming, United States

Hardin

Demographics

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 (1)

Big Horn County, Wyoming county in northern Wyoming, United States with a population of 11,575 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