ZIP code
77318
in Willis, TexasPopulation 20,792
52.52/ 100
Ranked #12,734 of 32,066 US ZIPs (top 40%)
Ranked #387 of 1,868 Texas ZIPs (top 21%)
Ranked #82 of 237 Houston-Pasadena-The Woodlands, TX ZIPs (top 35%)
Ranks are modeled estimates — ZIPs a few hundred places apart are effectively tied.
What defines this ZIP
Metrics where this ZIP sits in the tails of the national distribution — the ones that most set it apart. Select any tile for its definition and methodology.
Humid extreme heat
155.7 days/year
in the top 3.2% nationally
Lower is healthier
ST87thUS97thDefinition & source ›
The average number of days per year when modeled heat stress — temperature, humidity, sun, and wind combined — reaches levels hard on the body outdoors.
Full methodology ›Air-toxics cancer risk
40 per million
in the top 4.5% nationally
Lower is healthier
ST92ndUS96thDefinition & source ›
The EPA’s modeled estimate of added lifetime cancer risk from breathing outdoor air toxics, in cases per million people exposed over a lifetime.
Full methodology ›Industrial-pollution burden
in the top 7.9% nationally
Lower is healthier
ST86thUS92ndDefinition & source ›
The EPA’s modeled screening score for industrial chemical releases, weighting the amounts released by their toxicity and how many people live nearby — a relative comparison score, not a measured exposure.
Full methodology ›Dry extreme heat
54.4 days/year
in the top 8.2% nationally
Lower is healthier
ST26thUS92ndDefinition & source ›
The average number of days per year with a modeled daily high of at least 95 °F.
Full methodology ›Floodplain exposure
30.4%
in the top 9.9% nationally
Lower is healthier
ST85thUS90thDefinition & source ›
The share of this ZIP’s land area inside FEMA’s 1%-annual-chance floodplain — the “100-year” flood zone, where flooding has about a 1-in-100 chance in any given year.
Measured from FEMA’s mapped flood panels. Where a panel has not been mapped, no value is published for that ZIP — those ZIPs are absent from this comparison rather than counted as unexposed.
Full methodology ›Radon
0.7 pCi/L
in the bottom 4.5% nationally
Lower is healthier
ST28thUS4thDefinition & source ›
The modeled typical indoor radon level for this area, in picocuries per liter — the EPA recommends fixing a home at 4 pCi/L or above.
Modeled from indoor-radon measurements. In Alaska and Hawaii, where those measurements are not published, a US Geological Survey geologic radon-potential category stands in — a coarser input, disclosed rather than hidden.
Full methodology ›Obesity
31.2%
in the bottom 21% nationally
Lower is healthier
ST9thUS21stDefinition & source ›
The estimated share of adults with obesity, defined as a body-mass index of 30 or higher.
Full methodology ›Cross-source signals
Combined exposures in this ZIP
More than one environmental exposure stands out in this ZIP. Each is established independently and shown on its own above; they are grouped here for context — not because one causes the other.
This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.
See the full flooding, evacuation & humid-heat analysis →
The read
By the composite health measure, ZIP 77318, one of several in Willis, Texas ranks in the top 40% healthiest ZIPs nationally (12,734th) and the top 21% of Texas (387th).
A handful of measures stand out most sharply across the profile here: distance to a community health center registers at the national minimum, shared with about 23% of ZIPs. Modeled radon rests in the bottom 4.5% nationally, and arsenic stands in the bottom 12.7% nationally. Subsidized affordable housing lies in the top 14.4% nationally. On the other side, modeled humid heat lands in the top 3.2% nationally, air-toxics cancer risk sits in the top 4.5% nationally, and industrial-pollution burden is in the top 7.9% nationally. Modeled extreme heat settles in the top 8.2% nationally, floodplain exposure resides in the top 9.9% nationally, and modeled expected annual loss registers in the top 10.5% nationally.
Read against the ZIPs closest to it, outer-floodplain exposure runs far lower than the surrounding ZIPs on this measure. To spell things out, air-toxics cancer risk is a modeled EPA estimate of added lifetime cancer risk from breathing outdoor air, per million people. Industrial-pollution burden is the EPA's modeled screening score weighting industrial chemical releases by their toxicity and how many people live nearby. Expected annual loss is FEMA's modeled estimate, in dollars, of average yearly harm to people from natural hazards. Close by, ZIP 77304, just across the boundary, ranks healthier overall.
What’s driving this score
Nine domains make up the ZipVitals Score — here is how this ZIP does on each, and how much each one counts. Compare it against the US, this state and the Houston-Pasadena-The Woodlands, TX metro area.
Compared with the ZIP codes measured across all nine scoring domains — not with all US ZIP codes.
Lifting this score
Chronic Disease Burden
healthier than 62%
21%
Social Need / SDOH
healthier than 78%
16%
Mental Health
healthier than 62%
8%
Disability
healthier than 63%
7%
Healthcare Access
healthier than 73%
5%
About typical
Environmental Hazard
healthier than 52%
14%
Preventive Care
healthier than 43%
13%
Risk Behavior
healthier than 55%
11%
Holding it back
Climate / Disaster Risk
healthier than 4%
5%
Lifting this score
Social Need / SDOH
healthier than 80%
16%
Preventive Care
healthier than 87%
13%
Risk Behavior
healthier than 76%
11%
Mental Health
healthier than 67%
8%
Disability
healthier than 71%
7%
Healthcare Access
healthier than 67%
5%
About typical
Chronic Disease Burden
healthier than 50%
21%
Holding it back
Environmental Hazard
healthier than 34%
14%
Climate / Disaster Risk
healthier than 16%
5%
Lifting this score
Social Need / SDOH
healthier than 74%
16%
Environmental Hazard
healthier than 71%
14%
Preventive Care
healthier than 88%
13%
Risk Behavior
healthier than 71%
11%
Disability
healthier than 62%
7%
About typical
Mental Health
healthier than 51%
8%
Healthcare Access
healthier than 44%
5%
Holding it back
Chronic Disease Burden
healthier than 35%
21%
Climate / Disaster Risk
healthier than 23%
5%
“Share” is how much of this ZIP’s score the domain accounts for. Percentages are rounded; higher is healthier in every domain. How the score works, and who it compares you with ›
Findings that name this ZIP
2 of our published findings list this ZIP code. Each finding compares one published measure against a stated benchmark, and names only the ZIP codes whose estimates are reliable enough to rank. See all surprising findings.
Below what income predicts
The ZIP codes that outlive their incomes
Estimated life expectancy is 77.4 ± 1.1 years. A median household income of $92,415 predicts 79.8 years — 2.4 years below.
Ranked #3,232 of the 5,842 ZIP codes this finding names, ordered by years above what income predicts, highest first.
Highest-risk tenth
Air toxics and the years between the two ends of the risk scale
Modeled air-toxics cancer risk is 40.0 cases per million — among the tenth of compared ZIP codes with the most. Estimated life expectancy is 77.4 ± 1.1 years.
Ranked #504 of the 4,173 ZIP codes this finding names, ordered by modeled air-toxics risk, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
77303
Texasshares a border
Score 41.90
Closest healthier
77304
Texasshares a border
Score 53.57
Similar health profile
31523
Georgia98% similar profile
Score 53.30
How these were chosen: only ZIPs with a published Score appear — a nearby ZIP with too little data to score won’t. Nearby means closest by distance between ZIP boundaries, which can cross state lines. A similar health profile is a close match across the nine Score domains, not similar demographics. Distances are measured between ZIP boundaries — ZIPs that touch share a border. How distance is measured
Evidence
Every measure this page draws on, by source. Collapsed by default — the full data stays in the page for search engines either way.
Health OutcomesCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Arthritis among adults | 28.2% | 25.0–31.4 |
| High blood pressure among adults | 36.0% | 32.0–39.9 |
| Cancer (non-skin) or melanoma among adults | 9.4% | 8.5–10.3 |
| Current asthma among adults | 9.9% | 8.8–11.1 |
| Coronary heart disease among adults | 6.8% | 6.1–7.6 |
| Chronic obstructive pulmonary disease among adults | 7.1% | 6.3–8.0 |
| Depression among adults | 22.2% | 18.9–25.6 |
| Diagnosed diabetes among adults | 12.5% | 10.9–14.2 |
| High cholesterol among adults who have ever been screened | 40.3% | 36.0–44.4 |
| Obesity among adults | 31.2% | 24.9–37.9 |
| Stroke among adults | 3.5% | 3.3–3.9 |
| All teeth lost among adults aged >=65 years | 11.5% | 9.5–13.7 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 12.4% | 10.7–14.1 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 78.9% | 75.9–81.4 |
| Visits to doctor for routine checkup within the past year among adults | 76.0% | 72.3–79.2 |
| Cholesterol screening among adults | 88.1% | 86.6–89.5 |
| Colorectal cancer screening among adults aged 45–75 years | 66.3% | 62.1–70.2 |
| Visited dentist or dental clinic in the past year among adults | 59.8% | 56.6–62.7 |
| Mammography use among women aged 50-74 years | 76.0% | 69.7–81.4 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 17.2% | 14.3–20.2 |
| Current cigarette smoking among adults | 12.7% | 11.0–14.7 |
| No leisure-time physical activity among adults | 23.7% | 20.0–27.6 |
| Short sleep duration among adults | 36.8% | 32.6–41.0 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 18.8% | 16.4–21.3 |
| Frequent mental distress among adults | 16.1% | 14.3–17.9 |
| Frequent physical distress among adults | 13.3% | 11.8–15.0 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 13.4% | 11.9–15.0 |
| Any disability among adults | 29.6% | 25.8–33.5 |
| Hearing disability among adults | 7.6% | 6.8–8.5 |
| Independent living disability among adults | 7.7% | 6.9–8.6 |
| Mobility disability among adults | 14.3% | 12.5–16.2 |
| Self-care disability among adults | 3.6% | 3.3–4.0 |
| Vision disability among adults | 4.7% | 4.3–5.2 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | TX median (p10–p90) |
|---|---|---|---|
| Poverty rate | 6.6% | 10.6% (3.1–25.8%) n=32,364 | 12.4% (3.5–26.4%) n=1,869 |
| Uninsured 18–64 | 16.2% | 9.0% (1.5–24.3%) n=32,286 | 22.3% (8.2–41.5%) n=1,862 |
| No HS diploma (25+) | 9.1% | 7.9% (1.8–20.7%) n=32,505 | 12.2% (2.5–30.0%) n=1,881 |
| Bachelor's or higher (25+) | 29.0% | 23.3% (9.2–53.6%) n=32,505 | 21.9% (9.0–51.4%) n=1,881 |
| Unemployment rate (16+) | 3.2% | 3.9% (0.0–9.8%) n=32,274 | 4.2% (0.0–9.4%) n=1,865 |
| Households without a vehicle | 2.4% | 3.9% (0.0–12.5%) n=32,322 | 3.7% (0.0–10.8%) n=1,868 |
| Broadband subscription | 96.0% | 89.3% (75.1–97.1%) n=32,322 | 89.2% (75.0–97.3%) n=1,868 |
| Housing cost burden (≥30% income) | 23.5% | 23.7% (10.6–40.0%) n=32,322 | 26.2% (8.8–40.3%) n=1,868 |
| Homeownership rate | 80.7% | 78.7% (51.7–94.0%) n=32,322 | 75.0% (46.4–92.3%) n=1,868 |
| Crowded housing (>1 per room) | 1.3% | 1.3% (0.0–6.3%) n=32,322 | 3.1% (0.0–9.0%) n=1,868 |
| Foreign-born population | 7.9% | 2.6% (0.0–18.6%) n=32,553 | 8.1% (0.1–26.4%) n=1,886 |
| Single-parent households | 61.9% | 53.6% (37.3–74.1%) n=32,087 | 48.5% (34.3–70.6%) n=1,861 |
| Population 65+ | 19.8% | 19.4% (10.8–33.6%) n=32,553 | 16.1% (8.6–30.1%) n=1,886 |
| Median age | 43.1 yr | 42.2 yr (33.0–56.3) n=32,292 | 38.3 yr (30.9–52.3) n=1,866 |
| Median household income | $92,415 | $72,070 ($46,039–$118,707) n=30,318 | $69,983 ($46,006–$112,413) n=1,737 |
| Median home value | $316,900 | $222,200 ($100,300–$579,820) n=30,049 | $210,500 ($97,060–$429,760) n=1,693 |
| Median gross rent | $1,386 | $1,021 ($677–$1,912) n=25,670 | $1,154 ($764–$1,815) n=1,508 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | TX median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 77.4 yr ± 0.58 | 78.9 yr (74.7–82.8) n=31,308 | 78.2 yr (75.1–81.7) n=1,772 |
About the ± — it’s this estimate’s give-or-take (statisticians call it the standard error). The true life expectancy for this ZIP most likely falls within 0.58 years of 77.4, and it’s very unlikely to be off by more than twice that.
More ZIPs to explore ▾More ZIPs to explore ▴
How these lists were built: they draw only from ZIPs that have a published Score, so ZIPs with too little data to score are not listed. Distance-based lists use distance between ZIP boundaries with no state filter, so an out-of-state ZIP can appear. Statistically similar means a close match across the nine Score domains, not a demographic match: the measure is the cosine similarity between two ZIPs’ domain scores, taken over the domains both ZIPs have data for and only where that overlap covers at least six of the nine — and where no ZIP clears that minimum-overlap floor, that list is left out rather than filled with a weak match. How distance is measured