Data / Rankings / Housing units / Counties in Montana

Counties in Montana by housing units

Yellowstone County had the highest housing units of 56 counties in 2021, at 71,296. Petroleum County had the lowest, at 293. The median was 3,467 and the figure for Montana was 512,553. Source: the U.S. Census Bureau.

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Highest71,296Yellowstone County
Lowest293Petroleum County
Median3,46756 counties
Montana512,553History

Map of counties, 2021

Beaverhead County: 4,968 countBig Horn County: 4,548 countBlaine County: 2,828 countBroadwater County: 3,112 countCarbon County: 6,377 countCarter County: 802 countCascade County: 38,884 countChouteau County: 2,835 countCuster County: 5,753 countDaniels County: 1,145 countDawson County: 4,385 countDeer Lodge County: 5,454 countFallon County: 1,479 countFergus County: 5,995 countFlathead County: 49,595 countGallatin County: 51,826 countGarfield County: 737 countGlacier County: 5,351 countGolden Valley County: 487 countGranite County: 2,627 countHill County: 7,233 countJefferson County: 5,341 countJudith Basin County: 1,281 countLake County: 16,430 countLewis and Clark County: 33,299 countLiberty County: 940 countLincoln County: 11,041 countMcCone County: 1,109 countMadison County: 6,453 countMeagher County: 1,379 countMineral County: 2,556 countMissoula County: 54,194 countMusselshell County: 2,671 countPark County: 9,546 countPetroleum County: 293 countPhillips County: 2,251 countPondera County: 2,752 countPowder River County: 1,002 countPowell County: 2,928 countPrairie County: 656 countRavalli County: 20,914 countRichland County: 5,527 countRoosevelt County: 4,071 countRosebud County: 3,821 countSanders County: 6,793 countSheridan County: 2,039 countSilver Bow County: 17,209 countStillwater County: 4,682 countSweet Grass County: 1,889 countTeton County: 2,933 countToole County: 2,330 countTreasure County: 461 countValley County: 4,303 countWheatland County: 1,187 countWibaux County: 555 countYellowstone County: 71,296 count
  • Under 1,100
  • 1,100 to 2,400
  • 2,400 to 3,500
  • 3,500 to 5,400
  • 5,400 to 11K
  • 11K and over
count, 2021. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Yellowstone County: 71,296 countYellowstone County71,296Missoula County: 54,194 countMissoula County54,194Gallatin County: 51,826 countGallatin County51,826Flathead County: 49,595 countFlathead County49,595Cascade County: 38,884 countCascade County38,884Lewis and Clark County: 33,299 countLewis and Clark County33,299Ravalli County: 20,914 countRavalli County20,914Silver Bow County: 17,209 countSilver Bow County17,209Lake County: 16,430 countLake County16,430Lincoln County: 11,041 countLincoln County11,041Park County: 9,546 countPark County9,546Hill County: 7,233 countHill County7,233Sanders County: 6,793 countSanders County6,793Madison County: 6,453 countMadison County6,453Carbon County: 6,377 countCarbon County6,377Fergus County: 5,995 countFergus County5,995Custer County: 5,753 countCuster County5,753Richland County: 5,527 countRichland County5,527Deer Lodge County: 5,454 countDeer Lodge County5,454Glacier County: 5,351 countGlacier County5,351Jefferson County: 5,341 countJefferson County5,341Beaverhead County: 4,968 countBeaverhead County4,968Stillwater County: 4,682 countStillwater County4,682Big Horn County: 4,548 countBig Horn County4,548Dawson County: 4,385 countDawson County4,385Valley County: 4,303 countValley County4,303Roosevelt County: 4,071 countRoosevelt County4,071Rosebud County: 3,821 countRosebud County3,821Broadwater County: 3,112 countBroadwater County3,112Teton County: 2,933 countTeton County2,933Powell County: 2,928 countPowell County2,928Chouteau County: 2,835 countChouteau County2,835Blaine County: 2,828 countBlaine County2,828Pondera County: 2,752 countPondera County2,752Musselshell County: 2,671 countMusselshell County2,671Granite County: 2,627 countGranite County2,627Mineral County: 2,556 countMineral County2,556Toole County: 2,330 countToole County2,330Phillips County: 2,251 countPhillips County2,251Sheridan County: 2,039 countSheridan County2,039Sweet Grass County: 1,889 countSweet Grass County1,889Fallon County: 1,479 countFallon County1,479Meagher County: 1,379 countMeagher County1,379Judith Basin County: 1,281 countJudith Basin County1,281Wheatland County: 1,187 countWheatland County1,187Daniels County: 1,145 countDaniels County1,145McCone County: 1,109 countMcCone County1,109Powder River County: 1,002 countPowder River County1,002Liberty County: 940 countLiberty County940Carter County: 802 countCarter County802Garfield County: 737 countGarfield County737Prairie County: 656 countPrairie County656Wibaux County: 555 countWibaux County555Golden Valley County: 487 countGolden Valley County487Treasure County: 461 countTreasure County461Petroleum County: 293 countPetroleum County293Yellowstone County: 71,296 countYellowstone County71,296Missoula County: 54,194 countMissoula County54,194Gallatin County: 51,826 countGallatin County51,826Flathead County: 49,595 countFlathead County49,595Cascade County: 38,884 countCascade County38,884Lewis and Clark County: 33,299 countLewis and Clark County33,299Ravalli County: 20,914 countRavalli County20,914Silver Bow County: 17,209 countSilver Bow County17,209Lake County: 16,430 countLake County16,430Lincoln County: 11,041 countLincoln County11,041Park County: 9,546 countPark County9,546Hill County: 7,233 countHill County7,233Sanders County: 6,793 countSanders County6,793Madison County: 6,453 countMadison County6,453Carbon County: 6,377 countCarbon County6,377Fergus County: 5,995 countFergus County5,995Custer County: 5,753 countCuster County5,753Richland County: 5,527 countRichland County5,527Deer Lodge County: 5,454 countDeer Lodge County5,454Glacier County: 5,351 countGlacier County5,351Jefferson County: 5,341 countJefferson County5,341Beaverhead County: 4,968 countBeaverhead County4,968Stillwater County: 4,682 countStillwater County4,682Big Horn County: 4,548 countBig Horn County4,548Dawson County: 4,385 countDawson County4,385Valley County: 4,303 countValley County4,303Roosevelt County: 4,071 countRoosevelt County4,071Rosebud County: 3,821 countRosebud County3,821Broadwater County: 3,112 countBroadwater County3,112Teton County: 2,933 countTeton County2,933Powell County: 2,928 countPowell County2,928Chouteau County: 2,835 countChouteau County2,835Blaine County: 2,828 countBlaine County2,828Pondera County: 2,752 countPondera County2,752Musselshell County: 2,671 countMusselshell County2,671Granite County: 2,627 countGranite County2,627Mineral County: 2,556 countMineral County2,556Toole County: 2,330 countToole County2,330Phillips County: 2,251 countPhillips County2,251Sheridan County: 2,039 countSheridan County2,039Sweet Grass County: 1,889 countSweet Grass County1,889Fallon County: 1,479 countFallon County1,479Meagher County: 1,379 countMeagher County1,379Judith Basin County: 1,281 countJudith Basin County1,281Wheatland County: 1,187 countWheatland County1,187Daniels County: 1,145 countDaniels County1,145McCone County: 1,109 countMcCone County1,109Powder River County: 1,002 countPowder River County1,002Liberty County: 940 countLiberty County940Carter County: 802 countCarter County802Garfield County: 737 countGarfield County737Prairie County: 656 countPrairie County656Wibaux County: 555 countWibaux County555Golden Valley County: 487 countGolden Valley County487Treasure County: 461 countTreasure County461Petroleum County: 293 countPetroleum County293
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25001: total housing units. Retrieved 2026-10-12.

Full ranking

RankCounties2021
count
1Yellowstone County71,296
2Missoula County54,194
3Gallatin County51,826
4Flathead County49,595
5Cascade County38,884
6Lewis and Clark County33,299
7Ravalli County20,914
8Silver Bow County17,209
9Lake County16,430
10Lincoln County11,041
11Park County9,546
12Hill County7,233
13Sanders County6,793
14Madison County6,453
15Carbon County6,377
16Fergus County5,995
17Custer County5,753
18Richland County5,527
19Deer Lodge County5,454
20Glacier County5,351
21Jefferson County5,341
22Beaverhead County4,968
23Stillwater County4,682
24Big Horn County4,548
25Dawson County4,385
26Valley County4,303
27Roosevelt County4,071
28Rosebud County3,821
29Broadwater County3,112
30Teton County2,933
31Powell County2,928
32Chouteau County2,835
33Blaine County2,828
34Pondera County2,752
35Musselshell County2,671
36Granite County2,627
37Mineral County2,556
38Toole County2,330
39Phillips County2,251
40Sheridan County2,039
41Sweet Grass County1,889
42Fallon County1,479
43Meagher County1,379
44Judith Basin County1,281
45Wheatland County1,187
46Daniels County1,145
47McCone County1,109
48Powder River County1,002
49Liberty County940
50Carter County802
51Garfield County737
52Prairie County656
53Wibaux County555
54Golden Valley County487
55Treasure County461
56Petroleum County293

Other periods

About this ranking

All housing units, occupied and vacant: houses, apartments, mobile homes and rooms intended as separate living quarters. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

A survey estimate averaged over five years, not a count on one date.

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 B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.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 B25001: total housing units (Counties in Montana by housing units, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat

MLA 9

American Community Survey 5-year estimates, table B25001: total housing units, Counties in Montana by housing units, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Invokely, https://invokely.ai/rankings/housing-units/montana-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25001: total housing units. Counties in Montana by housing units, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Also distributed by Invokely, https://invokely.ai/rankings/housing-units/montana-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25001: total housing units, Counties in Montana by housing units, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat, via Invokely: https://invokely.ai/rankings/housing-units/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 B25001: total housing units: Counties in Montana by housing units, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/housing-units/montana-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25001: total housing units: Counties in Montana by housing units, 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-b25001.dat
L2  - https://invokely.ai/rankings/housing-units/montana-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/housing-units/montana-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25001: total housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25001.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest housing units?

Yellowstone County, with 71,296 in 2021, according to the U.S. Census Bureau.

Which county has the lowest housing units?

Petroleum County, with 293 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 B25001: total housing units. Retrieved 2026-10-12.

Housing units: other rankings

Counties in Montana: more rankings