RANKING · 2010 CENSUS · 56 SHOWN OF 56

Largest senior population, Montana counties · 2010

Montana counties home to the most residents aged 65 and over as of 2010. 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 2000

01Yellowstone County, MTMT172,69220,868+21%

02Flathead County, MTMT115,42913,103+36%

03Cascade County, MTMT85,02912,690+13%

04Missoula County, MTMT123,51312,457+30%

05Lewis and Clark County, MTMT75,3318,757+34%

06Gallatin County, MTMT128,7408,470+47%

07Ravalli County, MTMT48,5827,728+38%

08Silver Bow County, MTMT36,1185,614+1%

09Lake County, MTMT33,3924,834+26%

10Lincoln County, MTMT22,3284,040+41%

11Park County, MTMT18,2142,589+11%

12Fergus County, MTMT11,8252,490+5%

13Sanders County, MTMT14,0622,456+42%

14Custer County, MTMT12,0342,044+2%

15Hill County, MTMT16,1672,038−4%

16Carbon County, MTMT11,4661,895+18%

17Deer Lodge County, MTMT9,7091,782+0%

18Madison County, MTMT10,0261,612+37%

19Dawson County, MTMT8,6921,606+0%

20Jefferson County, MTMT13,3291,605+55%

21Beaverhead County, MTMT10,0431,565+25%

22Valley County, MTMT7,3851,525+5%

23Stillwater County, MTMT9,4451,495+26%

24Richland County, MTMT11,3771,448−4%

25Glacier County, MTMT13,4631,414+16%

26Big Horn County, MTMT12,7521,290+18%

27Teton County, MTMT6,4961,261+18%

28Pondera County, MTMT6,0721,161+11%

29Powell County, MTMT7,1571,152+15%

30Roosevelt County, MTMT10,2421,126−8%

31Rosebud County, MTMT8,2531,058+27%

32Chouteau County, MTMT5,8651,008−3%

33Broadwater County, MTMT8,493997+39%

34Mineral County, MTMT5,185926+68%

35Blaine County, MTMT6,860877−3%

36Phillips County, MTMT4,203863+6%

37Musselshell County, MTMT5,582854+9%

38Sheridan County, MTMT3,436782−19%

39Sweet Grass County, MTMT3,762754+19%

40Granite County, MTMT3,658753+67%

41Toole County, MTMT5,211739−12%

42Fallon County, MTMT2,959504−1%

43Liberty County, MTMT1,957462+9%

44Wheatland County, MTMT2,100448+3%

45Daniels County, MTMT1,612435−8%

46Judith Basin County, MTMT2,162431+8%

47Meagher County, MTMT2,137428+22%

48Powder River County, MTMT1,781396+15%

49McCone County, MTMT1,720382+2%

50Prairie County, MTMT1,112307+6%

51Carter County, MTMT1,383269+10%

52Garfield County, MTMT1,148248+0%

53Wibaux County, MTMT885243+6%

54Golden Valley County, MTMT844189+10%

55Treasure County, MTMT728171+19%

56Petroleum County, MTMT548103+23%

SHOWING 1–56 OF 56

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