ZIP code
77456
in Markham, TexasPopulation 1,394
39.52/ 100
Ranked #27,070 of 32,066 US ZIPs (bottom 16%)
Ranked #1,491 of 1,868 Texas ZIPs (bottom 20%)
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.
Uninsured (under 65)
21.4%
in the top 3.7% nationally
Lower is healthier
ST72ndUS96thDefinition & source ›
The estimated share of adults aged 18–64 with no current health-insurance coverage.
Full methodology ›Homeownership rate
100%
at the national maximum
Higher is healthier
ST99thUS99thDefinition & source ›
The share of occupied homes that are owned, rather than rented, by the people living in them.
Full methodology ›Crowded housing
13.4%
in the top 2.8% nationally
Lower is healthier
ST96thUS97thDefinition & source ›
The share of occupied homes with more than one person per room, the Census definition of crowded housing.
Full methodology ›Humid extreme heat
153.3 days/year
in the top 3.8% nationally
Lower is healthier
ST79thUS96thDefinition & 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 ›Poverty rate
35.8%
in the top 4.2% nationally
Lower is healthier
ST96thUS96thDefinition & source ›
The share of residents whose income is below the federal poverty line, from the Census Bureau’s American Community Survey.
Full methodology ›Housing-cost burden
4.4%
in the bottom 4.8% nationally
Lower is healthier
ST7thUS5thDefinition & source ›
The share of households spending 30% or more of their income on housing.
Full methodology ›Outer-floodplain exposure
6.4%
in the top 6.0% nationally
Lower is healthier
ST86thUS94thDefinition & source ›
The share of this ZIP’s land area inside FEMA’s 0.2%-annual-chance flood band — the “500-year” zone, a lower but real 1-in-500 yearly chance.
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 ›Mammography
68.6%
in the bottom 9.1% nationally
Higher is healthier
ST14thUS9thDefinition & source ›
The estimated share of women aged 50–74 who had a mammogram within the past two years.
Full methodology ›Radon
0.7 pCi/L
in the bottom 2.6% nationally
Lower is healthier
ST18thUS3rdDefinition & 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 ›Dry extreme heat
23.4 days/year
in the top 20% nationally
Lower is healthier
ST4thUS80thDefinition & source ›
The average number of days per year with a modeled daily high of at least 95 °F.
Full methodology ›The read
Overall, Markham, Texas (ZIP 77456) places in the bottom 16% nationally (27,070th) and the bottom 20% of Texas (1,491st).
The data opens on real and measurable burdens: modeled uninsured is in the top 3.7% nationally, and crowded housing lands in the top 2.8% nationally. Modeled humid heat stands in the top 3.8% nationally, and poverty registers in the top 4.2% nationally. Outer-floodplain exposure settles in the top 6.0% nationally, and modeled fair or poor health sits in the top 10.2% nationally. More encouragingly, homeownership lies at the national maximum, and housing-cost burden rests in the bottom 4.8% nationally. Unemployment resides at the national minimum, shared with about 15% of ZIPs. Households without a vehicle is at the national minimum, shared with about 16% of ZIPs.
Beside the areas that surround it, outer-floodplain exposure runs far higher than the surrounding ZIPs on this measure. For readers new to these terms, humid heat is a modeled heat-stress measure combining temperature, humidity, sun, and wind to gauge heat on the body outdoors. Outer-floodplain exposure is land with a lower but real 1-in-500 chance of flooding each year, nicknamed the "500-year floodplain". Among nearby ZIPs, the nearest healthier one overall is ZIP 77414, just across the boundary.
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.
Compared with the ZIP codes measured across all nine scoring domains — not with all US ZIP codes.
Lifting this score
Environmental Hazard
healthier than 99%
14%
Holding it back
Chronic Disease Burden
healthier than 23%
21%
Social Need / SDOH
healthier than 27%
16%
Preventive Care
healthier than 8%
13%
Risk Behavior
healthier than 12%
11%
Mental Health
healthier than 36%
8%
Disability
healthier than 14%
7%
Climate / Disaster Risk
healthier than 15%
5%
Healthcare Access
healthier than 40%
5%
Lifting this score
Environmental Hazard
healthier than 99%
14%
Climate / Disaster Risk
healthier than 81%
5%
Holding it back
Chronic Disease Burden
healthier than 11%
21%
Social Need / SDOH
healthier than 19%
16%
Preventive Care
healthier than 29%
13%
Risk Behavior
healthier than 17%
11%
Mental Health
healthier than 28%
8%
Disability
healthier than 16%
7%
Healthcare Access
healthier than 38%
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
One of our published findings lists 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.
Clean environment, heavy chronic burden
Where the environment and chronic illness point in opposite directions
Environmental-hazard standing 98.6 (top 10%); chronic-disease standing 23.4 — 75 points apart, cleaner on the environment than it is on chronic illness.
Ranked #752 of the 18,187 ZIP codes this finding names, ordered by the gap from cleanest environment to heaviest chronic burden, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
77414
Texasshares a border
Score 40.03
Closest healthier
77458
Texasshares a border
Score 41.13
Similar health profile
38859
Mississippi98% similar profile
Score 41.28
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 | 29.9% | 26.5–33.4 |
| High blood pressure among adults | 42.1% | 37.7–46.6 |
| Cancer (non-skin) or melanoma among adults | 8.2% | 7.3–9.0 |
| Current asthma among adults | 10.3% | 9.2–11.7 |
| Coronary heart disease among adults | 8.8% | 7.9–9.9 |
| Chronic obstructive pulmonary disease among adults | 10.0% | 8.7–11.5 |
| Depression among adults | 23.3% | 19.9–27.2 |
| Diagnosed diabetes among adults | 17.4% | 15.2–19.8 |
| High cholesterol among adults who have ever been screened | 40.1% | 35.6–44.8 |
| Obesity among adults | 41.1% | 32.4–50.1 |
| Stroke among adults | 4.8% | 4.3–5.3 |
| All teeth lost among adults aged >=65 years | 19.6% | 16.0–23.4 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 21.4% | 18.2–24.7 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 78.8% | 76.0–81.4 |
| Visits to doctor for routine checkup within the past year among adults | 75.4% | 71.5–79.0 |
| Cholesterol screening among adults | 84.9% | 82.9–86.7 |
| Colorectal cancer screening among adults aged 45–75 years | 59.4% | 53.8–64.9 |
| Visited dentist or dental clinic in the past year among adults | 46.1% | 42.2–50.0 |
| Mammography use among women aged 50-74 years | 68.6% | 59.4–76.9 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 15.3% | 12.5–18.4 |
| Current cigarette smoking among adults | 18.1% | 15.4–21.1 |
| No leisure-time physical activity among adults | 35.1% | 29.7–40.8 |
| Short sleep duration among adults | 40.3% | 32.6–48.2 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 29.1% | 25.5–33.0 |
| Frequent mental distress among adults | 18.3% | 16.2–20.6 |
| Frequent physical distress among adults | 17.5% | 15.5–19.9 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 17.7% | 15.7–20.2 |
| Any disability among adults | 39.3% | 34.5–44.5 |
| Hearing disability among adults | 9.3% | 8.3–10.5 |
| Independent living disability among adults | 11.2% | 9.9–12.7 |
| Mobility disability among adults | 21.0% | 18.3–23.9 |
| Self-care disability among adults | 6.1% | 5.4–6.8 |
| Vision disability among adults | 8.3% | 7.5–9.4 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | TX median (p10–p90) |
|---|---|---|---|
| Poverty rate | 35.8% | 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+) | 18.6% | 7.9% (1.8–20.7%) n=32,505 | 12.2% (2.5–30.0%) n=1,881 |
| Bachelor's or higher (25+) | 15.2% | 23.3% (9.2–53.6%) n=32,505 | 21.9% (9.0–51.4%) n=1,881 |
| Unemployment rate (16+) | 0.0% | 3.9% (0.0–9.8%) n=32,274 | 4.2% (0.0–9.4%) n=1,865 |
| Households without a vehicle | 0.0% | 3.9% (0.0–12.5%) n=32,322 | 3.7% (0.0–10.8%) n=1,868 |
| Broadband subscription | 90.4% | 89.3% (75.1–97.1%) n=32,322 | 89.2% (75.0–97.3%) n=1,868 |
| Housing cost burden (≥30% income) | 4.4% | 23.7% (10.6–40.0%) n=32,322 | 26.2% (8.8–40.3%) n=1,868 |
| Homeownership rate | 100.0% | 78.7% (51.7–94.0%) n=32,322 | 75.0% (46.4–92.3%) n=1,868 |
| Crowded housing (>1 per room) | 13.4% | 1.3% (0.0–6.3%) n=32,322 | 3.1% (0.0–9.0%) n=1,868 |
| Foreign-born population | 0.0% | 2.6% (0.0–18.6%) n=32,553 | 8.1% (0.1–26.4%) n=1,886 |
| Single-parent households | 26.3% | 53.6% (37.3–74.1%) n=32,087 | 48.5% (34.3–70.6%) n=1,861 |
| Population 65+ | 14.4% | 19.4% (10.8–33.6%) n=32,553 | 16.1% (8.6–30.1%) n=1,886 |
| Median age | 18.8 yr | 42.2 yr (33.0–56.3) n=32,292 | 38.3 yr (30.9–52.3) n=1,866 |
| Median household income | $65,284 | $72,070 ($46,039–$118,707) n=30,318 | $69,983 ($46,006–$112,413) n=1,737 |
| Median home value | $128,600 | $222,200 ($100,300–$579,820) n=30,049 | $210,500 ($97,060–$429,760) n=1,693 |
| Median gross rent | — | $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 | 75.8 yr ± 1.77 | 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 1.77 years of 75.8, 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