Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Montana

Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024

Golden Valley County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 56 counties in 2024, at 20.1%. Petroleum County had the lowest, at 9.6%. The median was 13.9% and the figure for Montana was 12.3%. Source: the U.S. Census Bureau.

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Highest20.1Golden Valley County
Lowest9.6Petroleum County
Median13.956 counties
Montana12.3History

Map of counties, 2024

Beaverhead County: 13.2 %Big Horn County: 18.5 %Blaine County: 15.9 %Broadwater County: 14.8 %Carbon County: 13.4 %Carter County: 16.5 %Cascade County: 11.8 %Chouteau County: 15.6 %Custer County: 12.6 %Daniels County: 11.6 %Dawson County: 10.7 %Deer Lodge County: 9.7 %Fallon County: 12.1 %Fergus County: 12.2 %Flathead County: 13.4 %Gallatin County: 9.9 %Garfield County: 15.9 %Glacier County: 17 %Golden Valley County: 20.1 %Granite County: 13.1 %Hill County: 14.2 %Jefferson County: 12.8 %Judith Basin County: 16 %Lake County: 17.4 %Lewis and Clark County: 10.7 %Liberty County: 16.7 %Lincoln County: 17.5 %McCone County: 15 %Madison County: 14.5 %Meagher County: 14.2 %Mineral County: 13.6 %Missoula County: 10.3 %Musselshell County: 16.8 %Park County: 9.9 %Petroleum County: 9.6 %Phillips County: 11.2 %Pondera County: 19.5 %Powder River County: 12.2 %Powell County: 13.4 %Prairie County: 19.2 %Ravalli County: 13.8 %Richland County: 11.9 %Roosevelt County: 15.4 %Rosebud County: 14 %Sanders County: 20.1 %Sheridan County: 14.4 %Silver Bow County: 11.6 %Stillwater County: 11.6 %Sweet Grass County: 11.1 %Teton County: 16 %Toole County: 17 %Treasure County: 13.9 %Valley County: 15.9 %Wheatland County: 18.4 %Wibaux County: 12.4 %Yellowstone County: 11.6 %
  • Under 12
  • 12 to 14
  • 14 to 16
  • 16 to 17
  • 17 and over
%, 2024. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2024

Golden Valley County: 20.1 %Golden Valley County20.1Sanders County: 20.1 %Sanders County20.1Pondera County: 19.5 %Pondera County19.5Prairie County: 19.2 %Prairie County19.2Big Horn County: 18.5 %Big Horn County18.5Wheatland County: 18.4 %Wheatland County18.4Lincoln County: 17.5 %Lincoln County17.5Lake County: 17.4 %Lake County17.4Glacier County: 17 %Glacier County17Toole County: 17 %Toole County17Musselshell County: 16.8 %Musselshell County16.8Liberty County: 16.7 %Liberty County16.7Carter County: 16.5 %Carter County16.5Judith Basin County: 16 %Judith Basin County16Teton County: 16 %Teton County16Blaine County: 15.9 %Blaine County15.9Garfield County: 15.9 %Garfield County15.9Valley County: 15.9 %Valley County15.9Chouteau County: 15.6 %Chouteau County15.6Roosevelt County: 15.4 %Roosevelt County15.4McCone County: 15 %McCone County15Broadwater County: 14.8 %Broadwater County14.8Madison County: 14.5 %Madison County14.5Sheridan County: 14.4 %Sheridan County14.4Hill County: 14.2 %Hill County14.2Meagher County: 14.2 %Meagher County14.2Rosebud County: 14 %Rosebud County14Treasure County: 13.9 %Treasure County13.9Ravalli County: 13.8 %Ravalli County13.8Mineral County: 13.6 %Mineral County13.6Carbon County: 13.4 %Carbon County13.4Flathead County: 13.4 %Flathead County13.4Powell County: 13.4 %Powell County13.4Beaverhead County: 13.2 %Beaverhead County13.2Granite County: 13.1 %Granite County13.1Jefferson County: 12.8 %Jefferson County12.8Custer County: 12.6 %Custer County12.6Wibaux County: 12.4 %Wibaux County12.4Fergus County: 12.2 %Fergus County12.2Powder River County: 12.2 %Powder River County12.2Fallon County: 12.1 %Fallon County12.1Richland County: 11.9 %Richland County11.9Cascade County: 11.8 %Cascade County11.8Daniels County: 11.6 %Daniels County11.6Silver Bow County: 11.6 %Silver Bow County11.6Stillwater County: 11.6 %Stillwater County11.6Yellowstone County: 11.6 %Yellowstone County11.6Phillips County: 11.2 %Phillips County11.2Sweet Grass County: 11.1 %Sweet Grass County11.1Dawson County: 10.7 %Dawson County10.7Lewis and Clark County: 10.7 %Lewis and Clark County10.7Missoula County: 10.3 %Missoula County10.3Gallatin County: 9.9 %Gallatin County9.9Park County: 9.9 %Park County9.9Deer Lodge County: 9.7 %Deer Lodge County9.7Petroleum County: 9.6 %Petroleum County9.6Golden Valley County: 20.1 %Golden Valley County20.1Sanders County: 20.1 %Sanders County20.1Pondera County: 19.5 %Pondera County19.5Prairie County: 19.2 %Prairie County19.2Big Horn County: 18.5 %Big Horn County18.5Wheatland County: 18.4 %Wheatland County18.4Lincoln County: 17.5 %Lincoln County17.5Lake County: 17.4 %Lake County17.4Glacier County: 17 %Glacier County17Toole County: 17 %Toole County17Musselshell County: 16.8 %Musselshell County16.8Liberty County: 16.7 %Liberty County16.7Carter County: 16.5 %Carter County16.5Judith Basin County: 16 %Judith Basin County16Teton County: 16 %Teton County16Blaine County: 15.9 %Blaine County15.9Garfield County: 15.9 %Garfield County15.9Valley County: 15.9 %Valley County15.9Chouteau County: 15.6 %Chouteau County15.6Roosevelt County: 15.4 %Roosevelt County15.4McCone County: 15 %McCone County15Broadwater County: 14.8 %Broadwater County14.8Madison County: 14.5 %Madison County14.5Sheridan County: 14.4 %Sheridan County14.4Hill County: 14.2 %Hill County14.2Meagher County: 14.2 %Meagher County14.2Rosebud County: 14 %Rosebud County14Treasure County: 13.9 %Treasure County13.9Ravalli County: 13.8 %Ravalli County13.8Mineral County: 13.6 %Mineral County13.6Carbon County: 13.4 %Carbon County13.4Flathead County: 13.4 %Flathead County13.4Powell County: 13.4 %Powell County13.4Beaverhead County: 13.2 %Beaverhead County13.2Granite County: 13.1 %Granite County13.1Jefferson County: 12.8 %Jefferson County12.8Custer County: 12.6 %Custer County12.6Wibaux County: 12.4 %Wibaux County12.4Fergus County: 12.2 %Fergus County12.2Powder River County: 12.2 %Powder River County12.2Fallon County: 12.1 %Fallon County12.1Richland County: 11.9 %Richland County11.9Cascade County: 11.8 %Cascade County11.8Daniels County: 11.6 %Daniels County11.6Silver Bow County: 11.6 %Silver Bow County11.6Stillwater County: 11.6 %Stillwater County11.6Yellowstone County: 11.6 %Yellowstone County11.6Phillips County: 11.2 %Phillips County11.2Sweet Grass County: 11.1 %Sweet Grass County11.1Dawson County: 10.7 %Dawson County10.7Lewis and Clark County: 10.7 %Lewis and Clark County10.7Missoula County: 10.3 %Missoula County10.3Gallatin County: 9.9 %Gallatin County9.9Park County: 9.9 %Park County9.9Deer Lodge County: 9.7 %Deer Lodge County9.7Petroleum County: 9.6 %Petroleum County9.6
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Golden Valley County20.1+5.2 pts
1Sanders County20.1+1.5 pts
3Pondera County19.5+2.8 pts
4Prairie County19.2+1.4 pts
5Big Horn County18.5+1.6 pts
6Wheatland County18.4+0.4 pts
7Lincoln County17.5+1.9 pts
8Lake County17.4+1.6 pts
9Glacier County17+1 pts
9Toole County17+0.7 pts
11Musselshell County16.8+1.9 pts
12Liberty County16.7-1.9 pts
13Carter County16.5+2.2 pts
14Judith Basin County16+1.7 pts
14Teton County16+1.4 pts
16Blaine County15.9-0.6 pts
16Garfield County15.9-1.5 pts
16Valley County15.9+1.4 pts
19Chouteau County15.6-1.4 pts
20Roosevelt County15.4+1.2 pts
21McCone County15+2.6 pts
22Broadwater County14.8+3.2 pts
23Madison County14.5+2.1 pts
24Sheridan County14.4+0.7 pts
25Hill County14.2-0.4 pts
25Meagher County14.2+1 pts
27Rosebud County14-0.4 pts
28Treasure County13.9+0.4 pts
29Ravalli County13.8+0.5 pts
30Mineral County13.6-0.4 pts
31Carbon County13.4+1 pts
31Flathead County13.4+0.8 pts
31Powell County13.4+1.3 pts
34Beaverhead County13.2+1.2 pts
35Granite County13.1-4.3 pts
36Jefferson County12.8+1.9 pts
37Custer County12.6-0.1 pts
38Wibaux County12.4+0.6 pts
39Fergus County12.2-1.9 pts
39Powder River County12.2-0.3 pts
41Fallon County12.1+1.5 pts
42Richland County11.9+0.8 pts
43Cascade County11.8+0.5 pts
44Daniels County11.6+1.7 pts
44Silver Bow County11.6+1 pts
44Stillwater County11.6+0.5 pts
44Yellowstone County11.60 pts
48Phillips County11.2-1.9 pts
49Sweet Grass County11.1+0.3 pts
50Dawson County10.7-0.2 pts
50Lewis and Clark County10.7-0.2 pts
52Missoula County10.30 pts
53Gallatin County9.9+0.1 pts
53Park County9.90 pts
55Deer Lodge County9.7-1 pts
56Petroleum County9.6-0.1 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

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. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_montana_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Montana by uninsured rate, ages 18 to 64 (US model-based estimate), 2024
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Golden Valley County, with 20.1% in 2024, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

Petroleum County, with 9.6% in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in Montana: more rankings