RANKING · 1990 CENSUS · 56 SHOWN OF 56

Largest senior population, Montana counties · 1990

Montana counties home to the most residents aged 65 and over as of 1990. Ranked by number of people, not the senior share. This list covers the 56 counties in Montana that qualify, ranked against each other statewide.

MontanaAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS –

01Yellowstone County, MTMT172,69213,999–

02Cascade County, MTMT85,0299,849–

03Missoula County, MTMT123,5138,098–

04Flathead County, MTMT115,4297,667–

05Silver Bow County, MTMT36,1185,779–

06Lewis and Clark County, MTMT75,3315,504–

07Gallatin County, MTMT128,7404,485–

08Ravalli County, MTMT48,5824,150–

09Lake County, MTMT33,3923,299–

10Fergus County, MTMT11,8252,406–

11Park County, MTMT18,2142,293–

12Lincoln County, MTMT22,3282,124–

13Hill County, MTMT16,1672,120–

14Deer Lodge County, MTMT9,7092,036–

15Custer County, MTMT12,0341,988–

16Carbon County, MTMT11,4661,672–

17Dawson County, MTMT8,6921,433–

18Richland County, MTMT11,3771,429–

19Sanders County, MTMT14,0621,399–

20Valley County, MTMT7,3851,376–

21Roosevelt County, MTMT10,2421,205–

22Glacier County, MTMT13,4631,160–

23Teton County, MTMT6,4961,118–

24Stillwater County, MTMT9,4451,090–

25Beaverhead County, MTMT10,0431,087–

26Pondera County, MTMT6,0721,058–

27Sheridan County, MTMT3,4361,023–

28Madison County, MTMT10,0261,008–

29Big Horn County, MTMT12,752962–

30Chouteau County, MTMT5,865948–

31Powell County, MTMT7,157930–

32Blaine County, MTMT6,860889–

33Jefferson County, MTMT13,329833–

34Musselshell County, MTMT5,582821–

35Toole County, MTMT5,211819–

36Phillips County, MTMT4,203797–

37Rosebud County, MTMT8,253721–

38Sweet Grass County, MTMT3,762667–

39Broadwater County, MTMT8,493543–

40Daniels County, MTMT1,612502–

41Granite County, MTMT3,658470–

42Fallon County, MTMT2,959462–

43Wheatland County, MTMT2,100462–

44Mineral County, MTMT5,185447–

45Judith Basin County, MTMT2,162406–

46McCone County, MTMT1,720375–

47Liberty County, MTMT1,957357–

48Prairie County, MTMT1,112350–

49Powder River County, MTMT1,781328–

50Meagher County, MTMT2,137315–

51Carter County, MTMT1,383282–

52Garfield County, MTMT1,148267–

53Wibaux County, MTMT885237–

54Golden Valley County, MTMT844166–

55Treasure County, MTMT728137–

56Petroleum County, MTMT54871–

SHOWING 1–56 OF 56

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS