RANKING · 2024 ACS · 56 SHOWN OF 56

Largest senior population, Montana counties

Montana counties home to the most residents aged 65 and over as of 2024. 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 2000

01Yellowstone County, MTMT172,69230,892+79%

02Flathead County, MTMT115,42923,352+142%

03Missoula County, MTMT123,51320,683+116%

04Gallatin County, MTMT128,74016,865+192%

05Cascade County, MTMT85,02916,614+48%

06Lewis and Clark County, MTMT75,33114,843+127%

07Ravalli County, MTMT48,58212,622+126%

08Lake County, MTMT33,3927,894+105%

09Silver Bow County, MTMT36,1186,972+26%

10Lincoln County, MTMT22,3286,382+123%

11Sanders County, MTMT14,0624,384+154%

12Park County, MTMT18,2144,360+87%

13Carbon County, MTMT11,4663,118+94%

14Jefferson County, MTMT13,3292,961+186%

15Fergus County, MTMT11,8252,931+24%

16Madison County, MTMT10,0262,839+141%

17Hill County, MTMT16,1672,632+23%

18Deer Lodge County, MTMT9,7092,528+43%

19Custer County, MTMT12,0342,482+24%

20Beaverhead County, MTMT10,0432,314+85%

21Stillwater County, MTMT9,4452,314+95%

22Richland County, MTMT11,3771,963+31%

23Dawson County, MTMT8,6921,868+17%

24Valley County, MTMT7,3851,843+26%

25Big Horn County, MTMT12,7521,814+67%

26Glacier County, MTMT13,4631,802+48%

27Broadwater County, MTMT8,4931,782+148%

28Musselshell County, MTMT5,5821,494+90%

29Powell County, MTMT7,1571,472+47%

30Teton County, MTMT6,4961,466+37%

31Rosebud County, MTMT8,2531,433+72%

32Mineral County, MTMT5,1851,394+153%

33Chouteau County, MTMT5,8651,381+32%

34Pondera County, MTMT6,0721,319+26%

35Roosevelt County, MTMT10,2421,286+5%

36Blaine County, MTMT6,8601,163+29%

37Granite County, MTMT3,6581,082+140%

38Phillips County, MTMT4,2031,013+25%

39Sweet Grass County, MTMT3,762959+51%

40Toole County, MTMT5,211912+9%

41Sheridan County, MTMT3,436833−14%

42Meagher County, MTMT2,137697+99%

43Fallon County, MTMT2,959614+21%

44Wheatland County, MTMT2,100596+37%

45Powder River County, MTMT1,781545+58%

46Judith Basin County, MTMT2,162539+35%

47Prairie County, MTMT1,112527+82%

48McCone County, MTMT1,720508+36%

49Daniels County, MTMT1,612473−0%

50Liberty County, MTMT1,957421−1%

51Carter County, MTMT1,383407+67%

52Garfield County, MTMT1,148289+17%

53Golden Valley County, MTMT844259+51%

54Wibaux County, MTMT885244+6%

55Treasure County, MTMT728167+16%

56Petroleum County, MTMT548126+50%

SHOWING 1–56 OF 56

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES