Health by ZIP

Williamson County, TX health estimates

Texas. 697,191 residents, 532,125 adults (the Census population estimates that PLACES uses). 18 ZIP Codes and 18 places with estimates.

Compare with another placeZIP Codes of the county (CSV)

Williamson County in Texas. 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 32.6% of the adults of Williamson County, TX have obesity.

The 95% confidence interval is 27.8% to 38.1%.

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: Williamson County, TX
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalTX figure (site aggregate)United States
All teeth lost among adults aged ≥65 yearsBRFSS 20228.4%6.8 to 10.312.5%below12.2%lowerinterval 11.8 to 12.68.5%6.9 to 10.412.8%below12.6%lowerinterval 12.2 to 13.0
Arthritis among adultsBRFSS 202319.6%17.4 to 22.221.6%in line25.4%lowerinterval 25.1 to 25.619.2%17.0 to 21.720.8%in line21.9%similar
Cancer (non-skin) or melanoma among adultsBRFSS 20236.6%6.0 to 7.46.1%in line7.9%lowerinterval 7.8 to 8.16.6%5.9 to 7.35.8%above6.6%similar
Chronic obstructive pulmonary disease among adultsBRFSS 20234.3%3.6 to 5.35.7%below6.2%lowerinterval 6.1 to 6.34.2%3.5 to 5.15.4%below5.3%lowerinterval 5.2 to 5.4
Coronary heart disease among adultsBRFSS 20234.5%4.0 to 5.25.6%below6.4%lowerinterval 6.2 to 6.54.5%3.9 to 5.25.4%below5.3%similar
Current asthma among adultsBRFSS 20239.0%8.0 to 10.39.5%in line9.8%similar9.0%8.0 to 10.39.5%in line9.8%similar
Depression among adultsBRFSS 202320.4%17.7 to 23.721.2%in line20.2%similar20.4%17.7 to 23.721.2%in line20.7%similar
Diagnosed diabetes among adultsBRFSS 20239.8%8.5 to 11.312.7%below12.0%lowerinterval 11.8 to 12.29.5%8.2 to 10.912.3%below10.3%similar
High blood pressure among adultsBRFSS 202329.2%26.1 to 32.633.1%below34.4%lowerinterval 34.0 to 34.728.6%25.7 to 32.132.3%below30.7%similar
High cholesterol among adults who have ever been screenedBRFSS 202332.8%29.4 to 36.535.1%in line37.4%lowerinterval 37.1 to 37.831.0%27.7 to 34.732.7%in line32.2%similar
Obesity among adultsBRFSS 202332.6%27.8 to 38.135.6%in line32.8%similar32.1%27.3 to 37.535.7%in line32.9%similar
Stroke among adultsBRFSS 20232.4%2.1 to 2.83.2%below3.4%lowerinterval 3.3 to 3.52.4%2.1 to 2.73.1%below2.9%lowerinterval 2.8 to 3.0
Prevention: Williamson County, TX
MeasureEstimate and interval on a scale of 0 to 100%Estimate95% intervalTX figure (site aggregate)United States
Cholesterol screening among adultsBRFSS 202387.6%85.7 to 89.484.6%above87.5%similar87.1%85.1 to 89.084.4%above85.6%similar
Colorectal cancer screening among adults aged 45–75 yearsBRFSS 202264.0%59.7 to 68.057.9%above66.3%similar62.4%58.1 to 66.554.8%above54.1%higherinterval 53.7 to 54.6
Current lack of health insurance among adults aged 18-64 yearsBRFSS 202312.2%9.9 to 14.719.1%below11.0%similar12.3%9.9 to 14.919.3%below11.5%similar
Mammography use among women aged 50-74 yearsBRFSS 202277.5%71.2 to 83.074.1%in line76.5%similar77.4%71.1 to 82.973.8%in line76.0%similar
Taking medicine to control high blood pressure among adults with high blood pressureBRFSS 202373.1%69.7 to 76.274.1%in line77.0%lowerinterval 76.5 to 77.557.0%52.6 to 61.358.4%in line57.5%similar
Visited dentist or dental clinic in the past year among adultsBRFSS 202264.0%60.9 to 66.954.6%above63.9%similar64.3%61.2 to 67.254.3%above63.4%similar
Visits to doctor for routine checkup within the past year among adultsBRFSS 202375.3%71.9 to 78.673.8%in line77.7%similar75.0%71.6 to 78.473.3%in line75.7%similar
Health risk behaviors: Williamson County, TX
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalTX figure (site aggregate)United States
Binge drinking among adultsBRFSS 202317.0%14.3 to 20.017.0%in line15.2%similar17.1%14.5 to 20.217.3%in line16.6%similar
Current cigarette smoking among adultsBRFSS 20239.9%8.0 to 12.312.5%below11.4%similar9.6%7.7 to 11.912.6%below11.6%similar
No leisure-time physical activity among adultsBRFSS 202322.5%19.0 to 26.627.8%below24.5%similar22.4%19.0 to 26.527.8%below23.7%similar
Short sleep duration among adultsBRFSS 202233.1%29.0 to 37.438.2%below36.0%similar32.9%28.7 to 37.138.5%below36.8%similar
Disability: Williamson County, TX
MeasureEstimate and interval on a scale of 0 to 40%Estimate95% intervalTX figure (site aggregate)United States
Any disability among adultsBRFSS 202325.2%21.9 to 29.130.9%below30.0%lowerinterval 29.7 to 30.325.3%22.1 to 29.230.6%below28.3%similar
Cognitive disability among adultsBRFSS 202312.0%10.3 to 14.015.1%below13.7%similar12.1%10.4 to 14.215.2%below14.1%similar
Hearing disability among adultsBRFSS 20235.3%4.6 to 6.06.3%below6.7%lowerinterval 6.6 to 6.95.3%4.7 to 6.16.2%below5.8%similar
Independent living disability among adultsBRFSS 20236.1%5.2 to 7.18.2%below7.9%lowerinterval 7.7 to 8.16.1%5.2 to 7.28.2%below7.6%lowerinterval 7.4 to 7.8
Mobility disability among adultsBRFSS 202310.1%8.6 to 12.014.0%below13.5%lowerinterval 13.3 to 13.710.0%8.5 to 11.913.6%below11.7%similar
Self-care disability among adultsBRFSS 20232.6%2.3 to 3.14.0%below3.8%lowerinterval 3.6 to 3.92.6%2.2 to 3.04.0%below3.4%lowerinterval 3.3 to 3.6
Vision disability among adultsBRFSS 20233.8%3.3 to 4.46.1%below5.5%lowerinterval 5.4 to 5.73.8%3.3 to 4.46.1%below5.2%lowerinterval 5.1 to 5.4
Health status: Williamson County, TX
MeasureEstimate and interval on a scale of 0 to 30%Estimate95% intervalTX figure (site aggregate)United States
Fair or poor self-rated health status among adultsBRFSS 202315.9%13.7 to 18.721.8%below19.2%lowerinterval 18.9 to 19.515.8%13.5 to 18.521.6%below18.3%similar
Frequent mental distress among adultsBRFSS 202315.5%13.6 to 17.616.9%in line15.6%similar15.6%13.7 to 17.817.1%in line16.3%similar
Frequent physical distress among adultsBRFSS 202310.5%9.2 to 12.213.2%below12.8%lowerinterval 12.6 to 13.010.4%9.0 to 12.013.0%below12.1%similar

ZIP Codes in Williamson County

ZIP Codes in Williamson County, TX, in ZIP Code order
ZIP CodeResidentsEstimate95% confidence intervalAgainst Williamson County
ZIP Code 765274,68835.9%31.0 to 41.0similar
ZIP Code 765302,65437.6%31.9 to 43.3similar
ZIP Code 7653710,94337.4%31.8 to 43.1similar
ZIP Code 7657419,36638.4%32.7 to 44.2similar
ZIP Code 765781,81735.3%29.9 to 40.9similar
ZIP Code 7861389,27931.2%26.6 to 35.9similar
ZIP Code 786151,69434.0%30.5 to 37.5similar
ZIP Code 7862639,93534.6%29.2 to 40.2similar
ZIP Code 7862840,37832.0%26.8 to 37.3similar
ZIP Code 7863327,73629.4%24.4 to 34.6similar
ZIP Code 7863437,95135.3%29.9 to 40.8similar
ZIP Code 7864220,38533.4%28.3 to 38.8similar
ZIP Code 7866460,28735.7%30.8 to 40.6similar
ZIP Code 7866561,57733.1%27.9 to 38.5similar
ZIP Code 7867428735.4%29.8 to 41.2similar
ZIP Code 7868157,50331.7%26.5 to 37.0similar
ZIP Code 7871736,98728.1%23.3 to 32.9similar
ZIP Code 7872931,82931.1%26.4 to 35.8similar

The dashed line in each drawing is Williamson 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 Williamson County as a CSV file, with all measures.

Cities and places in Williamson County

Places in Williamson County, TX, in name order
PlaceResidentsEstimate95% confidence intervalAgainst Williamson County
Bartlett1,63339.4%35.3 to 43.5similar
Brushy Creek22,51930.9%25.8 to 36.2similar
Cedar Park77,59531.1%26.5 to 35.8similar
Coupland28935.1%29.6 to 40.9similar
Florence1,17135.9%30.4 to 41.6similar
Georgetown67,17631.9%26.7 to 37.1similar
Granger1,18338.1%32.4 to 43.9similar
Hutto27,57735.7%30.2 to 41.4similar
Jarrell1,75336.3%30.6 to 41.9similar
Leander59,20231.9%27.4 to 36.5similar
Liberty Hill3,64633.1%27.8 to 38.5similar
Round Rock119,46834.2%28.9 to 39.6similar
Santa Rita Ranch3,15232.0%26.8 to 37.6similar
Serenada2,09831.2%26.0 to 36.6similar
Sonterra7,67937.9%32.2 to 43.7similar
Taylor16,26738.8%33.1 to 44.6similar
Thrall81635.7%30.2 to 41.4similar
Weir69934.6%29.1 to 40.2similar

The dashed line in each drawing is Williamson 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 Williamson County, TX, for 12 of the 40 measures.

Williamson County, TX: crude prevalence and 95% confidence interval in each PLACES release
Measure2022 release2023 release2024 release2025 release
COPD4.8%4.1 to 5.55.0%4.0 to 6.04.8%4.3 to 5.34.3%3.6 to 5.3
Coronary Heart Disease5.0%4.6 to 5.54.5%3.9 to 5.25.3%4.7 to 5.84.5%4.0 to 5.2
Current Asthma8.5%8.1 to 8.88.8%7.8 to 10.09.0%7.9 to 10.19.0%8.0 to 10.3
Depression20.1%19.1 to 21.022.8%19.6 to 26.321.0%18.4 to 23.920.4%17.7 to 23.7
Diabetes9.7%9.1 to 10.39.1%7.8 to 10.510.4%9.1 to 11.79.8%8.5 to 11.3
High Blood Pressure28.4%27.5 to 29.330.7%27.4 to 34.029.9%26.6 to 33.329.2%26.1 to 32.6
Obesity30.9%29.7 to 32.132.7%28.0 to 37.530.1%25.8 to 34.632.6%27.8 to 38.1
Health Insurance22.0%19.2 to 24.914.1%11.5 to 17.111.7%10.5 to 12.612.2%9.9 to 14.7
Binge Drinking19.5%18.9 to 20.016.6%14.0 to 19.419.1%16.3 to 22.317.0%14.3 to 20.0
Current Cigarette Smoking12.7%10.6 to 14.911.4%9.0 to 14.011.0%9.7 to 12.49.9%8.0 to 12.3
Physical Inactivity19.4%17.4 to 21.319.5%16.3 to 23.019.4%16.7 to 22.222.5%19.0 to 26.6
General Health12.1%10.6 to 13.613.3%11.3 to 15.715.3%13.8 to 16.915.9%13.7 to 18.7

Official sources

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

Cite this page

Health by ZIP. Williamson County, TX: 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/tx/williamson-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 Williamson County, TX

How does the obesity estimate of Williamson County, TX compare with Texas?

The Texas figure is 35.6% (site aggregate).

It has no confidence interval.

The Texas figure is inside the interval of Williamson County, TX. The estimate is in line with it.

How does the obesity estimate of Williamson County, TX 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 Williamson County, TX is similar.

What does CDC estimate for diagnosed diabetes in Williamson County, TX?

CDC estimates that 9.8% of the adults of Williamson County, TX have diagnosed diabetes.

The 95% confidence interval is 8.5% to 11.3%.

PLACES 2025, BRFSS 2023.

For how many measures is Williamson County, TX above or below the Texas figure?

Williamson County, TX and the Texas figure both have a value for 39 measures.

The estimate for Williamson County, TX is above the Texas figure for 3 measures.

It is below the Texas figure for 24 measures.

It is in line with the Texas figure for 12 measures.

6 estimates on the page are from a release before PLACES 2025. The report card names the release.

1 measure has no estimate for this area in any release on this site.