Counties in Montana by uninsured rate, under 19 (US model-based estimate)

McCone County had the highest uninsured rate, under 19 (US model-based estimate) of 56 counties in 2015, at 19.9%. Missoula County had the lowest, at 5.7%. The median was 10.9% and the figure for Montana was 8.1%. Source: the U.S. Census Bureau.

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Highest19.9McCone County
Median10.956 counties
Montana8.1History

Map of counties, 2015

Beaverhead County: 9.8 %Big Horn County: 10.9 %Blaine County: 11.7 %Broadwater County: 11.6 %Carbon County: 10.9 %Carter County: 14.9 %Cascade County: 6.2 %Chouteau County: 15.2 %Custer County: 7.4 %Daniels County: 11.8 %Dawson County: 7.1 %Deer Lodge County: 7.1 %Fallon County: 8.6 %Fergus County: 9.4 %Flathead County: 7.3 %Gallatin County: 7.2 %Garfield County: 15.1 %Glacier County: 11.2 %Golden Valley County: 12.5 %Granite County: 15.3 %Hill County: 9.1 %Jefferson County: 9 %Judith Basin County: 11 %Lake County: 12.3 %Lewis and Clark County: 6.6 %Liberty County: 9.3 %Lincoln County: 10.6 %McCone County: 19.9 %Madison County: 11.6 %Meagher County: 12.1 %Mineral County: 9.5 %Missoula County: 5.7 %Musselshell County: 9.5 %Park County: 9.6 %Petroleum County: 17.7 %Phillips County: 14 %Pondera County: 11.6 %Powder River County: 12.1 %Powell County: 9.9 %Prairie County: 12.6 %Ravalli County: 11.2 %Richland County: 8.7 %Roosevelt County: 12.6 %Rosebud County: 12.1 %Sanders County: 13.1 %Sheridan County: 10.1 %Silver Bow County: 6.2 %Stillwater County: 8.2 %Sweet Grass County: 10.6 %Teton County: 11.1 %Toole County: 10.1 %Treasure County: 15.2 %Valley County: 10.7 %Wheatland County: 15.4 %Wibaux County: 14.3 %Yellowstone County: 6.4 %
  • Under 7.5
  • 7.5 to 9.5
  • 9.5 to 11
  • 11 to 12
  • 12 to 14
  • 14 and over
%, 2015. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2015

McCone County: 19.9 %McCone County19.9Petroleum County: 17.7 %Petroleum County17.7Wheatland County: 15.4 %Wheatland County15.4Granite County: 15.3 %Granite County15.3Chouteau County: 15.2 %Chouteau County15.2Treasure County: 15.2 %Treasure County15.2Garfield County: 15.1 %Garfield County15.1Carter County: 14.9 %Carter County14.9Wibaux County: 14.3 %Wibaux County14.3Phillips County: 14 %Phillips County14Sanders County: 13.1 %Sanders County13.1Prairie County: 12.6 %Prairie County12.6Roosevelt County: 12.6 %Roosevelt County12.6Golden Valley County: 12.5 %Golden Valley County12.5Lake County: 12.3 %Lake County12.3Meagher County: 12.1 %Meagher County12.1Powder River County: 12.1 %Powder River County12.1Rosebud County: 12.1 %Rosebud County12.1Daniels County: 11.8 %Daniels County11.8Blaine County: 11.7 %Blaine County11.7Broadwater County: 11.6 %Broadwater County11.6Madison County: 11.6 %Madison County11.6Pondera County: 11.6 %Pondera County11.6Glacier County: 11.2 %Glacier County11.2Ravalli County: 11.2 %Ravalli County11.2Teton County: 11.1 %Teton County11.1Judith Basin County: 11 %Judith Basin County11Big Horn County: 10.9 %Big Horn County10.9Carbon County: 10.9 %Carbon County10.9Valley County: 10.7 %Valley County10.7Lincoln County: 10.6 %Lincoln County10.6Sweet Grass County: 10.6 %Sweet Grass County10.6Sheridan County: 10.1 %Sheridan County10.1Toole County: 10.1 %Toole County10.1Powell County: 9.9 %Powell County9.9Beaverhead County: 9.8 %Beaverhead County9.8Park County: 9.6 %Park County9.6Mineral County: 9.5 %Mineral County9.5Musselshell County: 9.5 %Musselshell County9.5Fergus County: 9.4 %Fergus County9.4Liberty County: 9.3 %Liberty County9.3Hill County: 9.1 %Hill County9.1Jefferson County: 9 %Jefferson County9Richland County: 8.7 %Richland County8.7Fallon County: 8.6 %Fallon County8.6Stillwater County: 8.2 %Stillwater County8.2Custer County: 7.4 %Custer County7.4Flathead County: 7.3 %Flathead County7.3Gallatin County: 7.2 %Gallatin County7.2Dawson County: 7.1 %Dawson County7.1Deer Lodge County: 7.1 %Deer Lodge County7.1Lewis and Clark County: 6.6 %Lewis and Clark County6.6Yellowstone County: 6.4 %Yellowstone County6.4Cascade County: 6.2 %Cascade County6.2Silver Bow County: 6.2 %Silver Bow County6.2Missoula County: 5.7 %Missoula County5.7McCone County: 19.9 %McCone County19.9Petroleum County: 17.7 %Petroleum County17.7Wheatland County: 15.4 %Wheatland County15.4Granite County: 15.3 %Granite County15.3Chouteau County: 15.2 %Chouteau County15.2Treasure County: 15.2 %Treasure County15.2Garfield County: 15.1 %Garfield County15.1Carter County: 14.9 %Carter County14.9Wibaux County: 14.3 %Wibaux County14.3Phillips County: 14 %Phillips County14Sanders County: 13.1 %Sanders County13.1Prairie County: 12.6 %Prairie County12.6Roosevelt County: 12.6 %Roosevelt County12.6Golden Valley County: 12.5 %Golden Valley County12.5Lake County: 12.3 %Lake County12.3Meagher County: 12.1 %Meagher County12.1Powder River County: 12.1 %Powder River County12.1Rosebud County: 12.1 %Rosebud County12.1Daniels County: 11.8 %Daniels County11.8Blaine County: 11.7 %Blaine County11.7Broadwater County: 11.6 %Broadwater County11.6Madison County: 11.6 %Madison County11.6Pondera County: 11.6 %Pondera County11.6Glacier County: 11.2 %Glacier County11.2Ravalli County: 11.2 %Ravalli County11.2Teton County: 11.1 %Teton County11.1Judith Basin County: 11 %Judith Basin County11Big Horn County: 10.9 %Big Horn County10.9Carbon County: 10.9 %Carbon County10.9Valley County: 10.7 %Valley County10.7Lincoln County: 10.6 %Lincoln County10.6Sweet Grass County: 10.6 %Sweet Grass County10.6Sheridan County: 10.1 %Sheridan County10.1Toole County: 10.1 %Toole County10.1Powell County: 9.9 %Powell County9.9Beaverhead County: 9.8 %Beaverhead County9.8Park County: 9.6 %Park County9.6Mineral County: 9.5 %Mineral County9.5Musselshell County: 9.5 %Musselshell County9.5Fergus County: 9.4 %Fergus County9.4Liberty County: 9.3 %Liberty County9.3Hill County: 9.1 %Hill County9.1Jefferson County: 9 %Jefferson County9Richland County: 8.7 %Richland County8.7Fallon County: 8.6 %Fallon County8.6Stillwater County: 8.2 %Stillwater County8.2Custer County: 7.4 %Custer County7.4Flathead County: 7.3 %Flathead County7.3Gallatin County: 7.2 %Gallatin County7.2Dawson County: 7.1 %Dawson County7.1Deer Lodge County: 7.1 %Deer Lodge County7.1Lewis and Clark County: 6.6 %Lewis and Clark County6.6Yellowstone County: 6.4 %Yellowstone County6.4Cascade County: 6.2 %Cascade County6.2Silver Bow County: 6.2 %Silver Bow County6.2Missoula County: 5.7 %Missoula County5.7
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2015 (%)Change on 2014
1McCone County19.9-1.6 pts
2Petroleum County17.7+4.7 pts
3Wheatland County15.4+2.4 pts
4Granite County15.3+0.2 pts
5Chouteau County15.2+1.4 pts
5Treasure County15.2+4.3 pts
7Garfield County15.1-3.4 pts
8Carter County14.9-3.1 pts
9Wibaux County14.3+0.2 pts
10Phillips County14-1.3 pts
11Sanders County13.1-0.6 pts
12Prairie County12.6+0.7 pts
12Roosevelt County12.6+2.1 pts
14Golden Valley County12.5-6.3 pts
15Lake County12.3+0.4 pts
16Meagher County12.1+0.5 pts
16Powder River County12.1-1.8 pts
16Rosebud County12.1+2.1 pts
19Daniels County11.80 pts
20Blaine County11.7-1.5 pts
21Broadwater County11.6-0.1 pts
21Madison County11.6-1.4 pts
21Pondera County11.6+1.1 pts
24Glacier County11.2+0.1 pts
24Ravalli County11.2+1.6 pts
26Teton County11.10 pts
27Judith Basin County11-8.8 pts
28Big Horn County10.9-0.7 pts
28Carbon County10.9-1.2 pts
30Valley County10.7+0.5 pts
31Lincoln County10.6+0.5 pts
31Sweet Grass County10.6-0.6 pts
33Sheridan County10.1+0.5 pts
33Toole County10.1+1.1 pts
35Powell County9.9+0.2 pts
36Beaverhead County9.8-0.7 pts
37Park County9.6-0.3 pts
38Mineral County9.5-0.4 pts
38Musselshell County9.5-2.9 pts
40Fergus County9.4-2.1 pts
41Liberty County9.3+0.8 pts
42Hill County9.1+0.5 pts
43Jefferson County9+0.3 pts
44Richland County8.7+0.5 pts
45Fallon County8.6+0.4 pts
46Stillwater County8.2-0.6 pts
47Custer County7.4-0.6 pts
48Flathead County7.3-0.1 pts
49Gallatin County7.2+0.5 pts
50Dawson County7.1-0.3 pts
50Deer Lodge County7.10 pts
52Lewis and Clark County6.6+0.4 pts
53Yellowstone County6.4-0.9 pts
54Cascade County6.2-0.4 pts
54Silver Bow County6.2-0.7 pts
56Missoula County5.7-1 pts

Other periods

About this ranking

People under 19 without health insurance coverage of any kind, as a percentage of all people under 19. 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. Under 19 matches the age limit for children in Medicaid and the Children's Health Insurance Program (CHIP).

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, under 19, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-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, under 19, all races, both sexes, all income levels, states and counties (Counties in Montana by uninsured rate, under 19 (US model-based estimate), 2015) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties, Counties in Montana by uninsured rate, under 19 (US model-based estimate), 2015. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-19/montana-counties?period=2015. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties. Counties in Montana by uninsured rate, under 19 (US model-based estimate), 2015. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-19/montana-counties?period=2015.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties, Counties in Montana by uninsured rate, under 19 (US model-based estimate), 2015 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-19/montana-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_montana_by_2015,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties: Counties in Montana by uninsured rate, under 19 (US model-based estimate), 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-19/montana-counties?period=2015. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties: Counties in Montana by uninsured rate, under 19 (US model-based estimate), 2015
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-2015-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-19/montana-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-19/montana-counties?period=2015.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 19, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Retrieved 2026-10-12.
ER  - 
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Questions

Which county has the highest uninsured rate, under 19 (US model-based estimate)?

McCone County, with 19.9% in 2015, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 19 (US model-based estimate)?

Missoula County, with 5.7% in 2015.

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, under 19, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, under 19 (US model-based estimate): other rankings

Counties in Montana: more rankings