RANKING · 2000 CENSUS · 56 SHOWN OF 56

Largest senior population, Montana counties · 2000

Montana counties home to the most residents aged 65 and over as of 2000. Ranked by number of people, not the senior share. This list covers the 56 counties in Montana that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 1990

01Yellowstone County, MTMT172,69217,243+23%

02Cascade County, MTMT85,02911,248+14%

03Flathead County, MTMT115,4299,656+26%

04Missoula County, MTMT123,5139,585+18%

05Lewis and Clark County, MTMT75,3316,533+19%

06Gallatin County, MTMT128,7405,770+29%

07Ravalli County, MTMT48,5825,589+35%

08Silver Bow County, MTMT36,1185,545−4%

09Lake County, MTMT33,3923,851+17%

10Lincoln County, MTMT22,3282,859+35%

11Fergus County, MTMT11,8252,364−2%

12Park County, MTMT18,2142,336+2%

13Hill County, MTMT16,1672,134+1%

14Custer County, MTMT12,0341,999+1%

15Deer Lodge County, MTMT9,7091,774−13%

16Sanders County, MTMT14,0621,724+23%

17Carbon County, MTMT11,4661,608−4%

18Dawson County, MTMT8,6921,603+12%

19Richland County, MTMT11,3771,504+5%

20Valley County, MTMT7,3851,457+6%

21Beaverhead County, MTMT10,0431,250+15%

22Roosevelt County, MTMT10,2421,230+2%

23Glacier County, MTMT13,4631,221+5%

24Stillwater County, MTMT9,4451,186+9%

25Madison County, MTMT10,0261,176+17%

26Big Horn County, MTMT12,7521,089+13%

27Teton County, MTMT6,4961,073−4%

28Pondera County, MTMT6,0721,044−1%

29Chouteau County, MTMT5,8651,043+10%

30Jefferson County, MTMT13,3291,035+24%

31Powell County, MTMT7,1571,004+8%

32Sheridan County, MTMT3,436967−5%

33Blaine County, MTMT6,860904+2%

34Toole County, MTMT5,211837+2%

35Rosebud County, MTMT8,253833+16%

36Phillips County, MTMT4,203811+2%

37Musselshell County, MTMT5,582787−4%

38Broadwater County, MTMT8,493719+32%

39Sweet Grass County, MTMT3,762635−5%

40Mineral County, MTMT5,185550+23%

41Fallon County, MTMT2,959508+10%

42Daniels County, MTMT1,612475−5%

43Granite County, MTMT3,658450−4%

44Wheatland County, MTMT2,100436−6%

45Liberty County, MTMT1,957425+19%

46Judith Basin County, MTMT2,162400−1%

47McCone County, MTMT1,720374−0%

48Meagher County, MTMT2,137351+11%

49Powder River County, MTMT1,781344+5%

50Prairie County, MTMT1,112289−17%

51Garfield County, MTMT1,148247−7%

52Carter County, MTMT1,383244−13%

53Wibaux County, MTMT885230−3%

54Golden Valley County, MTMT844172+4%

55Treasure County, MTMT728144+5%

56Petroleum County, MTMT54884+18%

SHOWING 1–56 OF 56

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