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. The median across all 56 is 1,494. Biggest climber in the top 100 since 2020: Musselshell County, MT, up 6 places to #28.

MontanaAll states All rankings

SAME RANKING BYCities States Metros

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Most unmarried people Most unmarried men

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%

04▲1Gallatin County, MTMT128,74016,865+192%

05▼1Cascade 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%

13▲2Carbon County, MTMT11,4663,118+94%

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

15▼2Fergus County, MTMT11,8252,931+24%

16▲1Madison County, MTMT10,0262,839+141%

17▼1Hill County, MTMT16,1672,632+23%

18▲1Deer Lodge County, MTMT9,7092,528+43%

19▼1Custer County, MTMT12,0342,482+24%

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

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

22▲1Richland County, MTMT11,3771,963+31%

23▼1Dawson County, MTMT8,6921,868+17%

24▲2Valley County, MTMT7,3851,843+26%

25▼1Big Horn County, MTMT12,7521,814+67%

26▼1Glacier County, MTMT13,4631,802+48%

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

28▲6Musselshell County, MTMT5,5821,494+90%

29▼1Powell County, MTMT7,1571,472+47%

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

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

32▲1Mineral County, MTMT5,1851,394+153%

33▲2Chouteau County, MTMT5,8651,381+32%

34▼2Pondera County, MTMT6,0721,319+26%

35▼6Roosevelt County, MTMT10,2421,286+5%

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

37▲2Granite County, MTMT3,6581,082+140%

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

39▼2Sweet Grass County, MTMT3,762959+51%

40Toole County, MTMT5,211912+9%

41Sheridan County, MTMT3,436833−14%

42▲1Meagher County, MTMT2,137697+99%

43▲2Fallon County, MTMT2,959614+21%

44Wheatland County, MTMT2,100596+37%

45▲1Powder River County, MTMT1,781545+58%

46▼4Judith Basin County, MTMT2,162539+35%

47▲4Prairie County, MTMT1,112527+82%

48▲1McCone County, MTMT1,720508+36%

49▼1Daniels County, MTMT1,6124730%

50▼3Liberty County, MTMT1,957421−1%

51▼1Carter County, MTMT1,383407+67%

52Garfield County, MTMT1,148289+17%

53▲1Golden Valley County, MTMT844259+51%

54▼1Wibaux County, MTMT885244+6%

55Treasure County, MTMT728167+16%

56Petroleum County, MTMT548126+50%

SHOWING 1–56 OF 56

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES