Data / Rankings / Households / Counties in Montana

Counties in Montana by households

Yellowstone County had the highest households of 56 counties in 2021, at 67,000. Petroleum County had the lowest, at 195. The median was 2,825 and the figure for Montana was 436,481. Source: the U.S. Census Bureau.

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Highest67,000Yellowstone County
Lowest195Petroleum County
Median2,82556 counties
Montana436,481History

Map of counties, 2021

Beaverhead County: 3,984 countBig Horn County: 3,534 countBlaine County: 2,248 countBroadwater County: 2,757 countCarbon County: 4,512 countCarter County: 618 countCascade County: 34,194 countChouteau County: 2,201 countCuster County: 4,872 countDaniels County: 784 countDawson County: 3,893 countDeer Lodge County: 4,161 countFallon County: 1,184 countFergus County: 5,208 countFlathead County: 40,780 countGallatin County: 46,378 countGarfield County: 404 countGlacier County: 4,005 countGolden Valley County: 349 countGranite County: 1,337 countHill County: 6,243 countJefferson County: 4,604 countJudith Basin County: 879 countLake County: 11,756 countLewis and Clark County: 30,011 countLiberty County: 765 countLincoln County: 8,458 countMcCone County: 829 countMadison County: 3,480 countMeagher County: 819 countMineral County: 1,981 countMissoula County: 49,437 countMusselshell County: 2,179 countPark County: 7,920 countPetroleum County: 195 countPhillips County: 1,732 countPondera County: 2,188 countPowder River County: 758 countPowell County: 2,300 countPrairie County: 484 countRavalli County: 18,749 countRichland County: 4,540 countRoosevelt County: 3,122 countRosebud County: 2,944 countSanders County: 5,390 countSheridan County: 1,444 countSilver Bow County: 15,028 countStillwater County: 3,733 countSweet Grass County: 1,389 countTeton County: 2,428 countToole County: 1,805 countTreasure County: 335 countValley County: 2,892 countWheatland County: 839 countWibaux County: 422 countYellowstone County: 67,000 count
  • Under 800
  • 800 to 1,800
  • 1,800 to 2,800
  • 2,800 to 4,100
  • 4,100 to 8,400
  • 8,400 and over
count, 2021. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Yellowstone County: 67,000 countYellowstone County67,000Missoula County: 49,437 countMissoula County49,437Gallatin County: 46,378 countGallatin County46,378Flathead County: 40,780 countFlathead County40,780Cascade County: 34,194 countCascade County34,194Lewis and Clark County: 30,011 countLewis and Clark County30,011Ravalli County: 18,749 countRavalli County18,749Silver Bow County: 15,028 countSilver Bow County15,028Lake County: 11,756 countLake County11,756Lincoln County: 8,458 countLincoln County8,458Park County: 7,920 countPark County7,920Hill County: 6,243 countHill County6,243Sanders County: 5,390 countSanders County5,390Fergus County: 5,208 countFergus County5,208Custer County: 4,872 countCuster County4,872Jefferson County: 4,604 countJefferson County4,604Richland County: 4,540 countRichland County4,540Carbon County: 4,512 countCarbon County4,512Deer Lodge County: 4,161 countDeer Lodge County4,161Glacier County: 4,005 countGlacier County4,005Beaverhead County: 3,984 countBeaverhead County3,984Dawson County: 3,893 countDawson County3,893Stillwater County: 3,733 countStillwater County3,733Big Horn County: 3,534 countBig Horn County3,534Madison County: 3,480 countMadison County3,480Roosevelt County: 3,122 countRoosevelt County3,122Rosebud County: 2,944 countRosebud County2,944Valley County: 2,892 countValley County2,892Broadwater County: 2,757 countBroadwater County2,757Teton County: 2,428 countTeton County2,428Powell County: 2,300 countPowell County2,300Blaine County: 2,248 countBlaine County2,248Chouteau County: 2,201 countChouteau County2,201Pondera County: 2,188 countPondera County2,188Musselshell County: 2,179 countMusselshell County2,179Mineral County: 1,981 countMineral County1,981Toole County: 1,805 countToole County1,805Phillips County: 1,732 countPhillips County1,732Sheridan County: 1,444 countSheridan County1,444Sweet Grass County: 1,389 countSweet Grass County1,389Granite County: 1,337 countGranite County1,337Fallon County: 1,184 countFallon County1,184Judith Basin County: 879 countJudith Basin County879Wheatland County: 839 countWheatland County839McCone County: 829 countMcCone County829Meagher County: 819 countMeagher County819Daniels County: 784 countDaniels County784Liberty County: 765 countLiberty County765Powder River County: 758 countPowder River County758Carter County: 618 countCarter County618Prairie County: 484 countPrairie County484Wibaux County: 422 countWibaux County422Garfield County: 404 countGarfield County404Golden Valley County: 349 countGolden Valley County349Treasure County: 335 countTreasure County335Petroleum County: 195 countPetroleum County195Yellowstone County: 67,000 countYellowstone County67,000Missoula County: 49,437 countMissoula County49,437Gallatin County: 46,378 countGallatin County46,378Flathead County: 40,780 countFlathead County40,780Cascade County: 34,194 countCascade County34,194Lewis and Clark County: 30,011 countLewis and Clark County30,011Ravalli County: 18,749 countRavalli County18,749Silver Bow County: 15,028 countSilver Bow County15,028Lake County: 11,756 countLake County11,756Lincoln County: 8,458 countLincoln County8,458Park County: 7,920 countPark County7,920Hill County: 6,243 countHill County6,243Sanders County: 5,390 countSanders County5,390Fergus County: 5,208 countFergus County5,208Custer County: 4,872 countCuster County4,872Jefferson County: 4,604 countJefferson County4,604Richland County: 4,540 countRichland County4,540Carbon County: 4,512 countCarbon County4,512Deer Lodge County: 4,161 countDeer Lodge County4,161Glacier County: 4,005 countGlacier County4,005Beaverhead County: 3,984 countBeaverhead County3,984Dawson County: 3,893 countDawson County3,893Stillwater County: 3,733 countStillwater County3,733Big Horn County: 3,534 countBig Horn County3,534Madison County: 3,480 countMadison County3,480Roosevelt County: 3,122 countRoosevelt County3,122Rosebud County: 2,944 countRosebud County2,944Valley County: 2,892 countValley County2,892Broadwater County: 2,757 countBroadwater County2,757Teton County: 2,428 countTeton County2,428Powell County: 2,300 countPowell County2,300Blaine County: 2,248 countBlaine County2,248Chouteau County: 2,201 countChouteau County2,201Pondera County: 2,188 countPondera County2,188Musselshell County: 2,179 countMusselshell County2,179Mineral County: 1,981 countMineral County1,981Toole County: 1,805 countToole County1,805Phillips County: 1,732 countPhillips County1,732Sheridan County: 1,444 countSheridan County1,444Sweet Grass County: 1,389 countSweet Grass County1,389Granite County: 1,337 countGranite County1,337Fallon County: 1,184 countFallon County1,184Judith Basin County: 879 countJudith Basin County879Wheatland County: 839 countWheatland County839McCone County: 829 countMcCone County829Meagher County: 819 countMeagher County819Daniels County: 784 countDaniels County784Liberty County: 765 countLiberty County765Powder River County: 758 countPowder River County758Carter County: 618 countCarter County618Prairie County: 484 countPrairie County484Wibaux County: 422 countWibaux County422Garfield County: 404 countGarfield County404Golden Valley County: 349 countGolden Valley County349Treasure County: 335 countTreasure County335Petroleum County: 195 countPetroleum County195
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Full ranking

RankCounties2021
count
1Yellowstone County67,000
2Missoula County49,437
3Gallatin County46,378
4Flathead County40,780
5Cascade County34,194
6Lewis and Clark County30,011
7Ravalli County18,749
8Silver Bow County15,028
9Lake County11,756
10Lincoln County8,458
11Park County7,920
12Hill County6,243
13Sanders County5,390
14Fergus County5,208
15Custer County4,872
16Jefferson County4,604
17Richland County4,540
18Carbon County4,512
19Deer Lodge County4,161
20Glacier County4,005
21Beaverhead County3,984
22Dawson County3,893
23Stillwater County3,733
24Big Horn County3,534
25Madison County3,480
26Roosevelt County3,122
27Rosebud County2,944
28Valley County2,892
29Broadwater County2,757
30Teton County2,428
31Powell County2,300
32Blaine County2,248
33Chouteau County2,201
34Pondera County2,188
35Musselshell County2,179
36Mineral County1,981
37Toole County1,805
38Phillips County1,732
39Sheridan County1,444
40Sweet Grass County1,389
41Granite County1,337
42Fallon County1,184
43Judith Basin County879
44Wheatland County839
45McCone County829
46Meagher County819
47Daniels County784
48Liberty County765
49Powder River County758
50Carter County618
51Prairie County484
52Wibaux County422
53Garfield County404
54Golden Valley County349
55Treasure County335
56Petroleum County195

Other periods

About this ranking

Number of households, which equals the number of occupied housing units. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

People living in group quarters, such as college dormitories, nursing homes and prisons, are not in households.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25003: occupied housing units (households) (Counties in Montana by households, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat

MLA 9

American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Montana by households, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Invokely, https://invokely.ai/rankings/households/montana-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25003: occupied housing units (households). Counties in Montana by households, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Also distributed by Invokely, https://invokely.ai/rankings/households/montana-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Montana by households, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat, via Invokely: https://invokely.ai/rankings/households/montana-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_montana_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Montana by households, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/households/montana-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Montana by households, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat
L2  - https://invokely.ai/rankings/households/montana-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/households/montana-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest households?

Yellowstone County, with 67,000 in 2021, according to the U.S. Census Bureau.

Which county has the lowest households?

Petroleum County, with 195 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Households: other rankings

Counties in Montana: more rankings