Custer County, Montana

Custer County: County in Montana, United States


Custer County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 11,699 and a population density of 1 people per km². After 10 years in 2020 county had an estimated population of 11,292 inhabitants. Its county seat is Miles City. The county was created 159 years ago in 1864.

Custer County locator map
Location of Custer County on Montana map.

Quick Facts about Custer County

Population : 11,292 (2020)
Country : United States of America
State : Montana (United States)
Different from : Custer County, Custer County, Custer County, Custer County, Custer County
Area : 9824 km2
Water as percent of area : 0.3%
Land as percent of area : 99.7%
Named for : George Armstrong Custer
Capital : Miles City
Establishment : January 01, 1865
Time Zone : America/Denver
Local time : 03:11:02 (22nd May 2024)
Density : 1 Pop. per km² as of 2020
Population growth : -3.6% (2010-2020)
Miles City MT Custer County Courthouse image
Miles City MT Custer County Courthouse
Miles City MT Custer County Courthouse image


Custer County is located at 46°15'10"N 105°34'18"W (46.2527000, -105.5717800). It has 2 neighbors: Prairie County and Powder River County.

Custer County map

The largest city of Custer County is Miles City with a population of 8,264. . See all Custer County cities & populated places.

Custer County Populated Places

Cities, towns, neighborhoods & other populated places in Custer County.

City Name Population Title
Miles City 8,264 City in Custer County, Montana
Ismay 19 Town in Montana

Custer County has 2 neighbours.

  • Miles City


According to census records, the population of Custer County decreased by 3.6% in 10 years.

Year Population % Change Method
2010 11,699 - census
2011 11,758 0.5% estimation process
2012 11,798 0.34% estimation process
2013 11,873 0.63% estimation process
2014 12,008 1.12% estimation process
2015 12,083 0.62% estimation process
2016 11,843 -2.03% estimation process
2017 11,726 -1% estimation process
2018 11,592 -1.16% estimation process
2019 11,402 -1.67% estimation process
2020 11,292 -0.97% estimation process

Comitatul Custer, Comte de Custer, Comté de Custer, Condado de Custer, Condado han Custer, Contea di Custer, Custer, Custer Kun, Custer Kūn, Custer konderria, Custer megye, Custeri maakond, Hrabstwo Custer, Kaster, Kustur, Okrug Kaster, Quan Custer, Quận Custer, ka si te xian, kasatera ka'unti, kasuta jun, mqatʿt kstyr, shhrstan kastr mwntana, Кастер, Къстър, Округ Кастер, Քաստեր շրջան, شهرستان کاستر، مونتانا, مقاطعة كستير, کسٹر کاؤنٹی،مونٹانا, کیسٹر کاؤنٹی، مونٹانا, কাসটের কাউন্টি, カスター郡, 卡斯特縣

Other places with the same name (6)

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