RANKING · 2020 CENSUS · 56 SHOWN OF 56

Oldest housing stock, Montana counties · 2020

Montana counties ranked by oldest median year of construction (2020 ACS). This list covers the 56 counties in Montana that qualify, ranked against each other statewide. The median across all 56 is 1972.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

01Deer Lodge County, MTMT9,7091954+1%

02Prairie County, MTMT1,11219540%

03Silver Bow County, MTMT36,1181955+1%

04Fergus County, MTMT11,82519580%

05Teton County, MTMT6,49619590%

06Meagher County, MTMT2,13719600%

07Powell County, MTMT7,15719600%

08Wheatland County, MTMT2,1001960+1%

09Toole County, MTMT5,21119600%

10Daniels County, MTMT1,6121961+1%

11McCone County, MTMT1,72019610%

12Sheridan County, MTMT3,43619610%

13Wibaux County, MTMT88519610%

14Pondera County, MTMT6,07219620%

15Custer County, MTMT12,03419640%

16Treasure County, MTMT72819640%

17Valley County, MTMT7,38519640%

18Liberty County, MTMT1,95719650%

19Chouteau County, MTMT5,8651967+1%

20Phillips County, MTMT4,20319670%

21Golden Valley County, MTMT8441968+1%

22Judith Basin County, MTMT2,1621968+1%

23Cascade County, MTMT85,02919690%

24Dawson County, MTMT8,6921970+1%

25Fallon County, MTMT2,9591970+1%

26Hill County, MTMT16,1671970+1%

27Blaine County, MTMT6,86019710%

28Roosevelt County, MTMT10,24219710%

29Garfield County, MTMT1,1481972+1%

30Glacier County, MTMT13,46319740%

31Powder River County, MTMT1,78119740%

32Big Horn County, MTMT12,75219750%

33Beaverhead County, MTMT10,0431975+1%

34Carter County, MTMT1,3831976+1%

35Petroleum County, MTMT5481976+1%

36Musselshell County, MTMT5,5821977+1%

37Richland County, MTMT11,3771977+1%

38Sweet Grass County, MTMT3,7621977+1%

39Granite County, MTMT3,6581978+1%

40Park County, MTMT18,2141978+1%

41Rosebud County, MTMT8,25319780%

42Carbon County, MTMT11,4661979+1%

43Lewis and Clark County, MTMT75,3311979+1%

44Yellowstone County, MTMT172,69219790%

45Mineral County, MTMT5,18519800%

46Missoula County, MTMT123,5131981+1%

47Stillwater County, MTMT9,4451982+1%

48Lincoln County, MTMT22,3281983+1%

49Ravalli County, MTMT48,5821984+1%

50Lake County, MTMT33,3921985+1%

51Jefferson County, MTMT13,3291985+1%

52Sanders County, MTMT14,0621986+1%

53Flathead County, MTMT115,4291987+1%

54Broadwater County, MTMT8,4931988+1%

55Madison County, MTMT10,0261991+1%

56Gallatin County, MTMT128,7401994+1%

SHOWING 1–56 OF 56

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS