Data / Rankings / Population aged 65 and over / Counties in Montana

Counties in Montana by share of population aged 65 and over

Prairie County had the highest share of population aged 65 and over of 56 counties in 2022, at 34.5%. Glacier County had the lowest, at 13.7%. The median was 24.9% and the figure for Montana was 20.7%. Source: the U.S. Census Bureau.

Highest34.5Prairie County
Lowest13.7Glacier County
Median24.956 counties
Montana20.7History

All counties, 2022

CSVChart (SVG)

Prairie CountyPrairie County: 34.5 %34.5Petroleum CountyPetroleum County: 33.2 %33.2Sanders CountySanders County: 32.7 %32.7Golden Valley CountyGolden Valley County: 30.9 %30.9Lincoln CountyLincoln County: 30.6 %30.6Madison CountyMadison County: 29.9 %29.9Powder River CountyPowder River County: 29.7 %29.7Judith Basin CountyJudith Basin County: 29.1 %29.1Granite CountyGranite County: 29 %29Meagher CountyMeagher County: 28.7 %28.7Sweet Grass CountySweet Grass County: 28.5 %28.5Ravalli CountyRavalli County: 28.3 %28.3Carter CountyCarter County: 28.1 %28.1Treasure CountyTreasure County: 28 %28Mineral CountyMineral County: 27.9 %27.9Daniels CountyDaniels County: 27.8 %27.8Deer Lodge CountyDeer Lodge County: 27.2 %27.2Carbon CountyCarbon County: 27.1 %27.1Fergus CountyFergus County: 27.1 %27.1Wheatland CountyWheatland County: 27 %27Sheridan CountySheridan County: 26.6 %26.6McCone CountyMcCone County: 26.5 %26.5Stillwater CountyStillwater County: 26.2 %26.2Musselshell CountyMusselshell County: 26.2 %26.2Wibaux CountyWibaux County: 26.1 %26.1Garfield CountyGarfield County: 25.6 %25.6Lake CountyLake County: 25.3 %25.3Jefferson CountyJefferson County: 24.9 %24.9Beaverhead CountyBeaverhead County: 24.8 %24.8Teton CountyTeton County: 24.4 %24.4Phillips CountyPhillips County: 24.3 %24.3Liberty CountyLiberty County: 24.2 %24.2Valley CountyValley County: 24.1 %24.1Park CountyPark County: 23.9 %23.9Powell CountyPowell County: 23.3 %23.3Chouteau CountyChouteau County: 23.3 %23.3Pondera CountyPondera County: 23 %23Broadwater CountyBroadwater County: 22.6 %22.6Flathead CountyFlathead County: 21.8 %21.8Dawson CountyDawson County: 21.8 %21.8Silver Bow CountySilver Bow County: 21.2 %21.2Custer CountyCuster County: 20.8 %20.8Lewis and Clark CountyLewis and Clark County: 20.6 %20.6Cascade CountyCascade County: 20 %20Fallon CountyFallon County: 19.6 %19.6Yellowstone CountyYellowstone County: 18.6 %18.6Missoula CountyMissoula County: 18.3 %18.3Toole CountyToole County: 18.2 %18.2Rosebud CountyRosebud County: 18 %18Richland CountyRichland County: 17.3 %17.3Hill CountyHill County: 17.3 %17.3Blaine CountyBlaine County: 16.8 %16.8Roosevelt CountyRoosevelt County: 14.1 %14.1Gallatin CountyGallatin County: 14 %14Big Horn CountyBig Horn County: 13.7 %13.7Glacier CountyGlacier County: 13.7 %13.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2022 (%)Change on 2021
1Prairie County34.5+0.7 pts
2Petroleum County33.2+1.3 pts
3Sanders County32.7-0 pts
4Golden Valley County30.9+1.1 pts
5Lincoln County30.6-0.2 pts
6Madison County29.9-0.5 pts
7Powder River County29.7+0.5 pts
8Judith Basin County29.1-0.5 pts
9Granite County29+0.5 pts
10Meagher County28.7-0.2 pts
11Sweet Grass County28.5+0.6 pts
12Ravalli County28.3+0.3 pts
13Carter County28.1+0.7 pts
14Treasure County28+0.8 pts
15Mineral County27.9+0.2 pts
16Daniels County27.8+1.9 pts
17Deer Lodge County27.2+0.8 pts
18Carbon County27.1+0.6 pts
19Fergus County27.1+0.6 pts
20Wheatland County27+0.8 pts
21Sheridan County26.6+0.5 pts
22McCone County26.5+0.8 pts
23Stillwater County26.2+0.8 pts
24Musselshell County26.2-0.7 pts
25Wibaux County26.1-0.6 pts
26Garfield County25.6-0.5 pts
27Lake County25.3+0.4 pts
28Jefferson County24.9+0.2 pts
29Beaverhead County24.8+0.1 pts
30Teton County24.40 pts
31Phillips County24.3-0 pts
32Liberty County24.2-0.2 pts
33Valley County24.1+0.5 pts
34Park County23.9+0.4 pts
35Powell County23.3+0.9 pts
36Chouteau County23.3+1 pts
37Pondera County23+0.3 pts
38Broadwater County22.6-0.1 pts
39Flathead County21.8+0.1 pts
40Dawson County21.8+0.8 pts
41Silver Bow County21.2+0.3 pts
42Custer County20.8+0.1 pts
43Lewis and Clark County20.6+0.4 pts
44Cascade County20+0.4 pts
45Fallon County19.6+0.7 pts
46Yellowstone County18.6+0.4 pts
47Missoula County18.3+0.4 pts
48Toole County18.2-0.6 pts
49Rosebud County18+0.3 pts
50Richland County17.3+0.6 pts
51Hill County17.3+0.7 pts
52Blaine County16.8+0.5 pts
53Roosevelt County14.1+0.4 pts
54Gallatin County14+0.4 pts
55Big Horn County13.7+0.3 pts
56Glacier County13.7+0.2 pts

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Montana by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"Montana","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=Montana&limit=10

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Questions

Which county has the highest share of population aged 65 and over?

Prairie County, with 34.5% in 2022, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Glacier County, with 13.7% in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in Montana: more rankings