Health by ZIP

Lewis and Clark County, MT health estimates

Montana. 75,011 residents, 59,205 adults (the Census population estimates that PLACES uses). 9 ZIP Codes and 12 places with estimates.

Compare with another placeZIP Codes of the county (CSV)

Lewis and Clark County in Montana. Boundaries: US Census Bureau.

The figures are model-based estimates for the adults of an area. They are not measurements. They say nothing about one person.

We do not produce estimates for individuals; only aggregated results for counties, places, census tracts, or ZCTAs.

First, it is not adequate to simply compare point estimates. The confidence intervals should also be considered, and some are very broad.

Centers for Disease Control and Prevention, PLACES Frequently Asked Questions (page dated 11 Dec 2025, read on 2 Oct 2026)

PLACES 2025 release. Survey years (BRFSS): 2022 and 2023. CDC updated the data on . What an estimate is. How to read an interval. The site gives no medical advice.

CDC estimates that 31.0% of the adults of Lewis and Clark County, MT have obesity.

The 95% confidence interval is 26.3% to 35.8%.

PLACES 2025, BRFSS 2023.

Report card: 40 measures by CDC category

Crude prevalence is the estimated share of all adults. Age-adjusted prevalence uses the 2000 US standard population, so that areas with different ages can be compared. CDC: Age-adjusted estimates are only available at the county and place-level.

"Higher" or "lower": the two 95% confidence intervals do not overlap. "Similar": they overlap. Against the state figure, which has no interval, the words are "above", "below" and "in line".

Health outcomes: Lewis and Clark County, MT
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalMT figure (site aggregate)United States
All teeth lost among adults aged ≥65 yearsBRFSS 202210.0%8.1 to 12.212.3%below12.2%similar9.9%8.0 to 12.012.5%below12.6%lowerinterval 12.2 to 13.0
Arthritis among adultsBRFSS 202330.8%27.6 to 33.828.4%in line25.4%higherinterval 25.1 to 25.625.6%23.0 to 28.324.2%in line21.9%higherinterval 21.6 to 22.1
Cancer (non-skin) or melanoma among adultsBRFSS 20239.7%8.8 to 10.79.3%in line7.9%higherinterval 7.8 to 8.17.6%6.9 to 8.57.5%in line6.6%higherinterval 6.4 to 6.7
Chronic obstructive pulmonary disease among adultsBRFSS 20236.3%5.0 to 7.77.0%in line6.2%similar5.2%4.2 to 6.35.9%in line5.3%similar
Coronary heart disease among adultsBRFSS 20236.0%5.1 to 6.96.6%in line6.4%similar4.7%4.0 to 5.45.2%in line5.3%similar
Current asthma among adultsBRFSS 202311.2%9.9 to 12.711.1%in line9.8%similar11.3%10.0 to 12.811.2%in line9.8%similar
Depression among adultsBRFSS 202325.8%22.5 to 29.224.9%in line20.2%higherinterval 19.9 to 20.527.0%23.6 to 30.525.9%in line20.7%higherinterval 20.4 to 21.0
Diagnosed diabetes among adultsBRFSS 20239.3%7.8 to 10.89.9%in line12.0%lowerinterval 11.8 to 12.27.5%6.3 to 8.78.3%in line10.3%lowerinterval 10.1 to 10.5
High blood pressure among adultsBRFSS 202330.6%27.2 to 33.831.9%in line34.4%lowerinterval 34.0 to 34.725.9%23.0 to 28.927.8%in line30.7%lowerinterval 30.4 to 31.0
High cholesterol among adults who have ever been screenedBRFSS 202333.5%30.2 to 36.832.8%in line37.4%lowerinterval 37.1 to 37.827.8%24.8 to 30.927.6%in line32.2%lowerinterval 31.9 to 32.6
Obesity among adultsBRFSS 202331.0%26.3 to 35.831.4%in line32.8%similar30.8%26.1 to 35.631.6%in line32.9%similar
Stroke among adultsBRFSS 20233.2%2.7 to 3.73.5%in line3.4%similar2.6%2.2 to 2.92.9%in line2.9%similar
Prevention: Lewis and Clark County, MT
MeasureEstimate and interval on a scale of 0 to 90%Estimate95% intervalMT figure (site aggregate)United States
Cholesterol screening among adultsBRFSS 202384.5%82.0 to 86.882.5%in line87.5%lowerinterval 87.3 to 87.881.7%78.7 to 84.580.2%in line85.6%lowerinterval 85.3 to 85.8
Colorectal cancer screening among adults aged 45–75 yearsBRFSS 202265.1%60.8 to 69.363.8%in line66.3%similar58.5%54.2 to 62.957.3%in line54.1%similar
Current lack of health insurance among adults aged 18-64 yearsBRFSS 20238.1%6.0 to 10.69.3%in line11.0%lowerinterval 10.7 to 11.38.4%6.2 to 11.29.6%in line11.5%similar
Mammography use among women aged 50-74 yearsBRFSS 202277.0%70.6 to 82.674.8%in line76.5%similar76.5%70.1 to 82.173.8%in line76.0%similar
Taking medicine to control high blood pressure among adults with high blood pressureBRFSS 202374.4%71.1 to 77.473.4%in line77.0%similar51.8%47.6 to 55.951.8%in line57.5%lowerinterval 56.8 to 58.2
Visited dentist or dental clinic in the past year among adultsBRFSS 202270.2%67.1 to 73.163.3%above63.9%higherinterval 63.6 to 64.270.8%67.7 to 73.662.7%above63.4%higherinterval 63.1 to 63.7
Visits to doctor for routine checkup within the past year among adultsBRFSS 202374.7%71.3 to 77.872.4%in line77.7%similar71.7%67.9 to 75.169.7%in line75.7%lowerinterval 75.4 to 76.0
Health risk behaviors: Lewis and Clark County, MT
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalMT figure (site aggregate)United States
Binge drinking among adultsBRFSS 202319.6%16.8 to 22.520.3%in line15.2%higherinterval 15.0 to 15.522.0%18.9 to 25.222.5%in line16.6%higherinterval 16.3 to 16.9
Current cigarette smoking among adultsBRFSS 202312.0%9.1 to 15.113.6%in line11.4%similar12.2%9.1 to 15.414.1%in line11.6%similar
No leisure-time physical activity among adultsBRFSS 202318.3%14.5 to 22.320.6%in line24.5%lowerinterval 24.2 to 24.817.3%13.7 to 21.319.6%in line23.7%lowerinterval 23.4 to 24.0
Short sleep duration among adultsBRFSS 202227.8%23.8 to 31.931.4%in line36.0%lowerinterval 35.7 to 36.328.1%24.1 to 32.332.4%below36.8%lowerinterval 36.5 to 37.2
Disability: Lewis and Clark County, MT
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalMT figure (site aggregate)United States
Any disability among adultsBRFSS 202329.5%24.9 to 34.030.9%in line30.0%similar27.8%23.4 to 32.229.2%in line28.3%similar
Cognitive disability among adultsBRFSS 202313.0%10.7 to 15.514.3%in line13.7%similar13.8%11.2 to 16.515.0%in line14.1%similar
Hearing disability among adultsBRFSS 20238.0%6.9 to 9.18.6%in line6.7%similar6.7%5.8 to 7.67.2%in line5.8%similar
Independent living disability among adultsBRFSS 20237.0%5.7 to 8.48.0%in line7.9%similar6.9%5.6 to 8.37.8%in line7.6%similar
Mobility disability among adultsBRFSS 202312.4%10.1 to 14.812.9%in line13.5%similar10.3%8.5 to 12.310.9%in line11.7%similar
Self-care disability among adultsBRFSS 20233.1%2.6 to 3.73.5%in line3.8%similar2.7%2.3 to 3.33.2%in line3.4%similar
Vision disability among adultsBRFSS 20233.9%3.2 to 4.64.6%in line5.5%lowerinterval 5.4 to 5.73.6%3.0 to 4.24.3%below5.2%lowerinterval 5.1 to 5.4
Health status: Lewis and Clark County, MT
MeasureEstimate and interval on a scale of 0 to 30%Estimate95% intervalMT figure (site aggregate)United States
Fair or poor self-rated health status among adultsBRFSS 202316.4%13.2 to 19.518.3%in line19.2%similar15.3%12.4 to 18.517.4%in line18.3%similar
Frequent mental distress among adultsBRFSS 202316.6%14.2 to 19.017.2%in line15.6%similar18.1%15.4 to 20.718.5%in line16.3%similar
Frequent physical distress among adultsBRFSS 202313.4%11.3 to 15.514.0%in line12.8%similar12.4%10.5 to 14.513.1%in line12.1%similar

ZIP Codes in Lewis and Clark County

ZIP Codes in Lewis and Clark County, MT, in ZIP Code order
ZIP CodeResidentsEstimate95% confidence intervalAgainst Lewis and Clark County
ZIP Code 5941088732.6%27.9 to 37.2similar
ZIP Code 5960130,84830.1%25.7 to 34.6similar
ZIP Code 5960229,39031.8%27.2 to 36.6similar
ZIP Code 5962529420.3%15.8 to 24.8lower
ZIP Code 5963324829.3%24.6 to 34.1similar
ZIP Code 596357,73833.5%29.0 to 38.0similar
ZIP Code 596391,23033.0%28.1 to 38.0similar
ZIP Code 5964011331.4%26.5 to 36.2similar
ZIP Code 5964861830.6%26.0 to 35.4similar

The dashed line in each drawing is Lewis and Clark County. The words are "higher" or "lower" when the two 95% confidence intervals do not overlap, and "similar" when they overlap. The table is in name order. The intervals of many rows overlap, so the table gives no rank.

A ZIP Code is in the county that holds the largest share of its land. A ZIP Code that is in two counties shows one time. Download the ZIP Codes of Lewis and Clark County as a CSV file, with all measures.

Cities and places in Lewis and Clark County

Places in Lewis and Clark County, MT, in name order
PlaceResidentsEstimate95% confidence intervalAgainst Lewis and Clark County
Augusta31632.8%28.1 to 37.8similar
East Helena1,94433.2%28.5 to 38.2similar
Helena32,09129.9%25.6 to 34.5similar
Helena Valley Northeast3,81333.2%28.3 to 38.0similar
Helena Valley Northwest4,70530.4%25.8 to 35.3similar
Helena Valley Southeast9,16834.1%29.4 to 39.1similar
Helena Valley West Central8,67031.6%26.9 to 36.4similar
Helena West Side1,33129.5%25.1 to 34.1similar
Lincoln99833.4%28.4 to 38.5similar
Marysville8230.7%25.5 to 35.6similar
Unionville20634.3%29.1 to 39.5similar
York9432.2%27.1 to 37.1similar

The dashed line in each drawing is Lewis and Clark County. The words are "higher" or "lower" when the two 95% confidence intervals do not overlap, and "similar" when they overlap. The table is in name order. The intervals of many rows overlap, so the table gives no rank.

Estimates in earlier PLACES releases

The current modeling procedure does not support using the estimates to track changes at the local level over time.

Centers for Disease Control and Prevention, PLACES Frequently Asked Questions (page dated 11 Dec 2025, read on 2 Oct 2026)

The table lists what each PLACES release published for Lewis and Clark County, MT, for 12 of the 40 measures.

Lewis and Clark County, MT: crude prevalence and 95% confidence interval in each PLACES release
Measure2022 release2023 release2024 release2025 release
COPD6.3%5.2 to 7.65.9%4.7 to 7.46.2%5.5 to 6.96.3%5.0 to 7.7
Coronary Heart Disease6.4%5.7 to 7.15.9%5.1 to 6.86.3%5.7 to 7.06.0%5.1 to 6.9
Current Asthma10.0%9.5 to 10.69.6%8.4 to 10.910.6%9.4 to 11.911.2%9.9 to 12.7
Depression23.4%22.1 to 24.822.4%19.0 to 26.023.1%20.1 to 26.225.8%22.5 to 29.2
Diabetes9.3%8.4 to 10.28.9%7.5 to 10.58.2%7.1 to 9.39.3%7.8 to 10.8
High Blood Pressure30.3%28.9 to 31.729.8%26.5 to 33.329.1%26.0 to 32.530.6%27.2 to 33.8
Obesity29.1%27.6 to 30.730.7%25.9 to 35.630.7%26.2 to 35.231.0%26.3 to 35.8
Health Insurance10.5%8.5 to 13.07.3%5.4 to 9.64.2%3.7 to 4.88.1%6.0 to 10.6
Binge Drinking20.1%19.4 to 20.819.8%16.9 to 23.120.8%17.9 to 24.119.6%16.8 to 22.5
Current Cigarette Smoking14.2%11.4 to 17.112.9%9.9 to 16.311.8%10.4 to 13.412.0%9.1 to 15.1
Physical Inactivity18.4%15.7 to 21.020.2%16.3 to 24.316.7%14.2 to 19.318.3%14.5 to 22.3
General Health11.5%9.7 to 13.712.8%10.5 to 15.413.6%12.1 to 15.216.4%13.2 to 19.5

Official sources

The links open the pages of the agencies in a new tab.

Cite this page

Health by ZIP. Lewis and Clark County, MT: CDC PLACES estimates, 2025 release. Source: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health. CDC updated the data on 4 Dec 2025. https://healthbyzip.com/county/mt/lewis-and-clark-county/

The address of this page stays the same. CDC's own citation is at the foot of the page.

Where the figures come from

Source: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, 2025 release. CDC updated the data on . The page shows the 2022, 2023, 2024 releases as a record. The data are a US government work in the public domain. Data set on data.cdc.gov. The boundaries and the links between ZIP Codes, counties and places come from the US Census Bureau. Percentages have one decimal, as CDC publishes them. A state figure is a site aggregate: the site computes it. The site corrects an error of its own processing at the next build. See corrections.

Questions about Lewis and Clark County, MT

How does the obesity estimate of Lewis and Clark County, MT compare with Montana?

The Montana figure is 31.4% (site aggregate).

It has no confidence interval.

The Montana figure is inside the interval of Lewis and Clark County, MT. The estimate is in line with it.

How does the obesity estimate of Lewis and Clark County, MT compare with the nation?

The US estimate is 32.8%.

The 95% confidence interval is 32.4% to 33.1%.

The two intervals overlap. The estimate for Lewis and Clark County, MT is similar.

What does CDC estimate for diagnosed diabetes in Lewis and Clark County, MT?

CDC estimates that 9.3% of the adults of Lewis and Clark County, MT have diagnosed diabetes.

The 95% confidence interval is 7.8% to 10.8%.

PLACES 2025, BRFSS 2023.

For how many measures is Lewis and Clark County, MT above or below the Montana figure?

Lewis and Clark County, MT and the Montana figure both have a value for 40 measures.

The estimate for Lewis and Clark County, MT is above the Montana figure for 1 measure.

It is below the Montana figure for 1 measure.

It is in line with the Montana figure for 38 measures.