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

Glacier County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 56 counties in 2016, at 27.6%. Fallon County had the lowest, at 7.4%. The median was 12.3% and the figure for Montana was 11.9%. Source: the U.S. Census Bureau.

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Highest27.6Glacier County
Lowest7.4Fallon County
Median12.356 counties
Montana11.9History

Map of counties, 2016

Beaverhead County: 12.3 %Big Horn County: 24.9 %Blaine County: 21 %Broadwater County: 12.3 %Carbon County: 11.5 %Carter County: 14.5 %Cascade County: 12.6 %Chouteau County: 18.4 %Custer County: 9.9 %Daniels County: 11.3 %Dawson County: 9.1 %Deer Lodge County: 10.5 %Fallon County: 7.4 %Fergus County: 10.8 %Flathead County: 11.4 %Gallatin County: 8.6 %Garfield County: 10.7 %Glacier County: 27.6 %Golden Valley County: 11.7 %Granite County: 13.9 %Hill County: 15.6 %Jefferson County: 9.8 %Judith Basin County: 11.4 %Lake County: 18.9 %Lewis and Clark County: 9.1 %Liberty County: 15.9 %Lincoln County: 14.7 %McCone County: 14.8 %Madison County: 12.3 %Meagher County: 12.8 %Mineral County: 13.1 %Missoula County: 11.2 %Musselshell County: 13.6 %Park County: 11.6 %Petroleum County: 15.3 %Phillips County: 16.5 %Pondera County: 15.6 %Powder River County: 12 %Powell County: 11.9 %Prairie County: 12 %Ravalli County: 13.5 %Richland County: 9.7 %Roosevelt County: 23.6 %Rosebud County: 15.8 %Sanders County: 17.5 %Sheridan County: 11.2 %Silver Bow County: 10.9 %Stillwater County: 8.7 %Sweet Grass County: 10.7 %Teton County: 13 %Toole County: 13.7 %Treasure County: 15 %Valley County: 15 %Wheatland County: 17.7 %Wibaux County: 11.9 %Yellowstone County: 10.3 %
  • Under 11
  • 11 to 12
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  • 14 to 16
  • 16 and over
%, 2016. 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, 2016

Glacier County: 27.6 %Glacier County27.6Big Horn County: 24.9 %Big Horn County24.9Roosevelt County: 23.6 %Roosevelt County23.6Blaine County: 21 %Blaine County21Lake County: 18.9 %Lake County18.9Chouteau County: 18.4 %Chouteau County18.4Wheatland County: 17.7 %Wheatland County17.7Sanders County: 17.5 %Sanders County17.5Phillips County: 16.5 %Phillips County16.5Liberty County: 15.9 %Liberty County15.9Rosebud County: 15.8 %Rosebud County15.8Hill County: 15.6 %Hill County15.6Pondera County: 15.6 %Pondera County15.6Petroleum County: 15.3 %Petroleum County15.3Treasure County: 15 %Treasure County15Valley County: 15 %Valley County15McCone County: 14.8 %McCone County14.8Lincoln County: 14.7 %Lincoln County14.7Carter County: 14.5 %Carter County14.5Granite County: 13.9 %Granite County13.9Toole County: 13.7 %Toole County13.7Musselshell County: 13.6 %Musselshell County13.6Ravalli County: 13.5 %Ravalli County13.5Mineral County: 13.1 %Mineral County13.1Teton County: 13 %Teton County13Meagher County: 12.8 %Meagher County12.8Cascade County: 12.6 %Cascade County12.6Beaverhead County: 12.3 %Beaverhead County12.3Broadwater County: 12.3 %Broadwater County12.3Madison County: 12.3 %Madison County12.3Powder River County: 12 %Powder River County12Prairie County: 12 %Prairie County12Powell County: 11.9 %Powell County11.9Wibaux County: 11.9 %Wibaux County11.9Golden Valley County: 11.7 %Golden Valley County11.7Park County: 11.6 %Park County11.6Carbon County: 11.5 %Carbon County11.5Flathead County: 11.4 %Flathead County11.4Judith Basin County: 11.4 %Judith Basin County11.4Daniels County: 11.3 %Daniels County11.3Missoula County: 11.2 %Missoula County11.2Sheridan County: 11.2 %Sheridan County11.2Silver Bow County: 10.9 %Silver Bow County10.9Fergus County: 10.8 %Fergus County10.8Garfield County: 10.7 %Garfield County10.7Sweet Grass County: 10.7 %Sweet Grass County10.7Deer Lodge County: 10.5 %Deer Lodge County10.5Yellowstone County: 10.3 %Yellowstone County10.3Custer County: 9.9 %Custer County9.9Jefferson County: 9.8 %Jefferson County9.8Richland County: 9.7 %Richland County9.7Dawson County: 9.1 %Dawson County9.1Lewis and Clark County: 9.1 %Lewis and Clark County9.1Stillwater County: 8.7 %Stillwater County8.7Gallatin County: 8.6 %Gallatin County8.6Fallon County: 7.4 %Fallon County7.4Glacier County: 27.6 %Glacier County27.6Big Horn County: 24.9 %Big Horn County24.9Roosevelt County: 23.6 %Roosevelt County23.6Blaine County: 21 %Blaine County21Lake County: 18.9 %Lake County18.9Chouteau County: 18.4 %Chouteau County18.4Wheatland County: 17.7 %Wheatland County17.7Sanders County: 17.5 %Sanders County17.5Phillips County: 16.5 %Phillips County16.5Liberty County: 15.9 %Liberty County15.9Rosebud County: 15.8 %Rosebud County15.8Hill County: 15.6 %Hill County15.6Pondera County: 15.6 %Pondera County15.6Petroleum County: 15.3 %Petroleum County15.3Treasure County: 15 %Treasure County15Valley County: 15 %Valley County15McCone County: 14.8 %McCone County14.8Lincoln County: 14.7 %Lincoln County14.7Carter County: 14.5 %Carter County14.5Granite County: 13.9 %Granite County13.9Toole County: 13.7 %Toole County13.7Musselshell County: 13.6 %Musselshell County13.6Ravalli County: 13.5 %Ravalli County13.5Mineral County: 13.1 %Mineral County13.1Teton County: 13 %Teton County13Meagher County: 12.8 %Meagher County12.8Cascade County: 12.6 %Cascade County12.6Beaverhead County: 12.3 %Beaverhead County12.3Broadwater County: 12.3 %Broadwater County12.3Madison County: 12.3 %Madison County12.3Powder River County: 12 %Powder River County12Prairie County: 12 %Prairie County12Powell County: 11.9 %Powell County11.9Wibaux County: 11.9 %Wibaux County11.9Golden Valley County: 11.7 %Golden Valley County11.7Park County: 11.6 %Park County11.6Carbon County: 11.5 %Carbon County11.5Flathead County: 11.4 %Flathead County11.4Judith Basin County: 11.4 %Judith Basin County11.4Daniels County: 11.3 %Daniels County11.3Missoula County: 11.2 %Missoula County11.2Sheridan County: 11.2 %Sheridan County11.2Silver Bow County: 10.9 %Silver Bow County10.9Fergus County: 10.8 %Fergus County10.8Garfield County: 10.7 %Garfield County10.7Sweet Grass County: 10.7 %Sweet Grass County10.7Deer Lodge County: 10.5 %Deer Lodge County10.5Yellowstone County: 10.3 %Yellowstone County10.3Custer County: 9.9 %Custer County9.9Jefferson County: 9.8 %Jefferson County9.8Richland County: 9.7 %Richland County9.7Dawson County: 9.1 %Dawson County9.1Lewis and Clark County: 9.1 %Lewis and Clark County9.1Stillwater County: 8.7 %Stillwater County8.7Gallatin County: 8.6 %Gallatin County8.6Fallon County: 7.4 %Fallon County7.4
%. 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

RankCounties2016 (%)Change on 2015
1Glacier County27.6-5.5 pts
2Big Horn County24.9-5.8 pts
3Roosevelt County23.6-8.1 pts
4Blaine County21-7.5 pts
5Lake County18.9-9.3 pts
6Chouteau County18.4-6.6 pts
7Wheatland County17.7-9.2 pts
8Sanders County17.5-7.5 pts
9Phillips County16.5-5.3 pts
10Liberty County15.9-1.6 pts
11Rosebud County15.8-4.9 pts
12Hill County15.6-4.2 pts
12Pondera County15.6-8.1 pts
14Petroleum County15.3-6.2 pts
15Treasure County15-5.4 pts
15Valley County15-3.4 pts
17McCone County14.8-8.1 pts
18Lincoln County14.7-5.5 pts
19Carter County14.5-5.6 pts
20Granite County13.9-6.4 pts
21Toole County13.7-4.3 pts
22Musselshell County13.6-3.5 pts
23Ravalli County13.5-8.8 pts
24Mineral County13.1-5.1 pts
25Teton County13-5.6 pts
26Meagher County12.8-6.2 pts
27Cascade County12.6-3.8 pts
28Beaverhead County12.3-5.1 pts
28Broadwater County12.3-4.2 pts
28Madison County12.3-3.8 pts
31Powder River County12-3.2 pts
31Prairie County12-4.9 pts
33Powell County11.9-5.8 pts
33Wibaux County11.9-9.3 pts
35Golden Valley County11.7-8.1 pts
36Park County11.6-4.7 pts
37Carbon County11.5-4.9 pts
38Flathead County11.4-4.5 pts
38Judith Basin County11.4-3.6 pts
40Daniels County11.3-3.8 pts
41Missoula County11.2-2.9 pts
41Sheridan County11.2-2 pts
43Silver Bow County10.9-3.9 pts
44Fergus County10.8-5.7 pts
45Garfield County10.7-6.8 pts
45Sweet Grass County10.7-3.5 pts
47Deer Lodge County10.5-5.3 pts
48Yellowstone County10.3-4.6 pts
49Custer County9.9-4.2 pts
50Jefferson County9.8-2.1 pts
51Richland County9.7-5 pts
52Dawson County9.1-4 pts
52Lewis and Clark County9.1-3 pts
54Stillwater County8.7-4.4 pts
55Gallatin County8.6-3.9 pts
56Fallon County7.4-2.9 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-2016-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), 2016) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-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), 2016. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties?period=2016. 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), 2016. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties?period=2016.

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), 2016 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties?period=2016 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_montana_by_2016,
  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), 2016}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2016-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties?period=2016. 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-2016-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), 2016
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-2016-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/montana-counties?period=2016.
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-2016-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)?

Glacier County, with 27.6% in 2016, according to the U.S. Census Bureau.

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

Fallon County, with 7.4% in 2016.

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