ZIP code
21128
in Perry Hall, MarylandPopulation 15,501
64.39/ 100
Ranked #2,256 of 32,066 US ZIPs (top 7.1%)
Ranked #99 of 458 Maryland ZIPs (top 22%)
Ranked #49 of 157 Baltimore-Columbia-Towson, MD ZIPs (top 31%)
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.
Median household income
$128,069
in the top 7.5% nationally
Higher is healthier
ST69thUS93rdDefinition & source ›
The middle household income in this ZIP — half of households earn more, half earn less — in dollars per year.
Full methodology ›PFAS in drinking water
58.5%
in the top 8.6% nationally
Lower is healthier
ST93rdUS91stDefinition & source ›
The modeled probability that PFAS “forever chemicals” would be detected in untreated groundwater in this area, the source private wells draw on.
A modeled likelihood for untreated groundwater, the source drawn on by private wells, which are federally unregulated. It is not a measurement of treated water delivered by a public system, and it is not a test of any individual well.
Full methodology ›Tooth loss
5.6%
in the bottom 3.5% nationally
Lower is healthier
ST13thUS3rdDefinition & source ›
The estimated share of adults aged 65 and older who have lost all of their natural teeth.
Full methodology ›Cognitive disability
10.5%
in the bottom 7.3% nationally
Lower is healthier
ST21stUS7thDefinition & source ›
The estimated share of adults with serious difficulty concentrating, remembering, or making decisions.
Full methodology ›Poverty rate
3.1%
in the bottom 10.0% nationally
Lower is healthier
ST21stUS10thDefinition & source ›
The share of residents whose income is below the federal poverty line, from the Census Bureau’s American Community Survey.
Full methodology ›Independent-living disability
5.9%
in the bottom 8.3% nationally
Lower is healthier
ST25thUS8thDefinition & source ›
The estimated share of adults who have difficulty doing errands alone, such as visiting a doctor’s office, because of a physical, mental, or emotional condition.
Full methodology ›Floodplain exposure
1.8%
in the bottom 17% nationally
Lower is healthier
ST9thUS17thDefinition & 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 ›The read
Perry Hall, Maryland (ZIP 21128) ranks in the top 7.1% healthiest ZIPs nationally (2,256th) and the top 22% of Maryland (99th).
The strongest marks in the data are worth naming first: household income registers in the top 7.5% nationally, and modeled tooth loss lies in the bottom 3.5% nationally. Modeled cognitive disability is in the bottom 7.3% nationally, and poverty registers in the bottom 10.0% nationally. Modeled independent living disability lies in the bottom 8.3% nationally, modeled energy burden is in the bottom 10.3% nationally, and fiber broadband registers in the top 13.5% nationally. Modeled mammography lies in the top 11.1% nationally. On the other side, modeled pfas is in the top 8.6% nationally, and PFAS in drinking water registers in the top 11.2% nationally.
Against its neighbors, park land runs far higher than the surrounding ZIPs on this measure. For context, pfas is the man-made "forever chemicals" that build up in the body and environment instead of breaking down; here a modeled estimate of the chance a private well contains them. PFAS in drinking water is the family of man-made "forever chemicals" that build up in the body and environment instead of breaking down. Energy burden is the share of household income that goes to home energy bills. The closest ZIP that ranks healthier overall is ZIP 21057, less than a tenth of a mile away.
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 Baltimore-Columbia-Towson, MD 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 78%
21%
Social Need / SDOH
healthier than 91%
16%
Preventive Care
healthier than 85%
13%
Risk Behavior
healthier than 89%
11%
Mental Health
healthier than 84%
8%
Disability
healthier than 91%
7%
Climate / Disaster Risk
healthier than 68%
5%
Healthcare Access
healthier than 62%
5%
About typical
Environmental Hazard
healthier than 55%
14%
Nothing measured is holding this score back.
Lifting this score
Chronic Disease Burden
healthier than 73%
21%
Social Need / SDOH
healthier than 78%
16%
Risk Behavior
healthier than 79%
11%
Mental Health
healthier than 63%
8%
Disability
healthier than 75%
7%
Climate / Disaster Risk
healthier than 81%
5%
Healthcare Access
healthier than 65%
5%
About typical
Preventive Care
healthier than 57%
13%
Holding it back
Environmental Hazard
healthier than 39%
14%
Lifting this score
Chronic Disease Burden
healthier than 64%
21%
Social Need / SDOH
healthier than 64%
16%
Risk Behavior
healthier than 76%
11%
Mental Health
healthier than 67%
8%
Disability
healthier than 60%
7%
Climate / Disaster Risk
healthier than 77%
5%
Healthcare Access
healthier than 62%
5%
About typical
Environmental Hazard
healthier than 59%
14%
Preventive Care
healthier than 47%
13%
Nothing measured is holding this score back.
“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.
Above its nearby ZIPs
The ZIP codes that outlive their neighbors
Estimated life expectancy is 80.0 ± 1.5 years. The 45 nearest ZIP codes with estimates average 77.8 years — 2.2 years above them.
Ranked #1,292 of the 3,687 ZIP codes this finding names, ordered by years above the nearby-ZIP average, highest first.
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
21087
Marylandshares a border
Score 62.30
Closest healthier
21057
Marylandless than 0.1 mi away
Score 66.20
Similar health profile
48306
Michigan100% similar profile
Score 72.00
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 | 26.9% | 25.0–28.9 |
| High blood pressure among adults | 33.6% | 31.3–36.0 |
| Cancer (non-skin) or melanoma among adults | 8.9% | 8.2–9.7 |
| Current asthma among adults | 10.1% | 9.2–11.1 |
| Coronary heart disease among adults | 5.7% | 5.1–6.4 |
| Chronic obstructive pulmonary disease among adults | 5.7% | 4.9–6.6 |
| Depression among adults | 20.4% | 18.4–22.5 |
| Diagnosed diabetes among adults | 11.4% | 10.2–12.7 |
| High cholesterol among adults who have ever been screened | 38.8% | 36.5–41.3 |
| Obesity among adults | 29.4% | 26.2–32.6 |
| Stroke among adults | 2.9% | 2.6–3.3 |
| All teeth lost among adults aged >=65 years | 5.6% | 4.6–6.7 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 6.1% | 5.1–7.2 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 77.4% | 75.1–79.6 |
| Visits to doctor for routine checkup within the past year among adults | 80.2% | 78.0–82.2 |
| Cholesterol screening among adults | 90.5% | 89.3–91.6 |
| Colorectal cancer screening among adults aged 45–75 years | 67.8% | 64.8–71.0 |
| Visited dentist or dental clinic in the past year among adults | 66.0% | 63.5–68.5 |
| Mammography use among women aged 50-74 years | 80.0% | 75.6–84.1 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 13.3% | 11.7–15.1 |
| Current cigarette smoking among adults | 9.6% | 8.1–11.1 |
| No leisure-time physical activity among adults | 23.0% | 20.3–25.8 |
| Short sleep duration among adults | 34.1% | 31.1–37.4 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 15.1% | 13.2–17.0 |
| Frequent mental distress among adults | 14.4% | 13.0–16.0 |
| Frequent physical distress among adults | 10.7% | 9.5–11.9 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 10.5% | 9.3–11.8 |
| Any disability among adults | 23.1% | 20.6–25.6 |
| Hearing disability among adults | 5.8% | 5.2–6.5 |
| Independent living disability among adults | 5.9% | 5.2–6.8 |
| Mobility disability among adults | 10.7% | 9.3–12.3 |
| Self-care disability among adults | 2.7% | 2.4–3.1 |
| Vision disability among adults | 3.5% | 3.1–4.0 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 23.2% | 20.5–25.8 |
| Food insecurity in the past 12 months among adults | 10.9% | 9.3–12.5 |
| Received food stamps in the past 12 months among adults | 7.5% | 6.3–8.8 |
| Housing insecurity in the past 12 months among adults | 9.5% | 8.1–10.9 |
| Lack of reliable transportation in the past 12 months among adults | 5.8% | 5.1–6.6 |
| Loneliness among adults | 32.6% | 29.3–35.8 |
| Utility services shut-off threat in the past 12 months among adults | 5.7% | 4.9–6.5 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | MD median (p10–p90) |
|---|---|---|---|
| Poverty rate | 3.1% | 10.6% (3.1–25.8%) n=32,364 | 6.7% (1.1–19.3%) n=459 |
| Uninsured 18–64 | 4.8% | 9.0% (1.5–24.3%) n=32,286 | 4.8% (0.0–13.1%) n=459 |
| No HS diploma (25+) | 5.6% | 7.9% (1.8–20.7%) n=32,505 | 6.3% (0.5–16.6%) n=463 |
| Bachelor's or higher (25+) | 54.8% | 23.3% (9.2–53.6%) n=32,505 | 37.3% (15.0–64.4%) n=463 |
| Unemployment rate (16+) | 2.3% | 3.9% (0.0–9.8%) n=32,274 | 3.9% (0.0–8.6%) n=457 |
| Households without a vehicle | 4.6% | 3.9% (0.0–12.5%) n=32,322 | 3.2% (0.0–12.4%) n=457 |
| Broadband subscription | 95.4% | 89.3% (75.1–97.1%) n=32,322 | 93.3% (81.2–100.0%) n=457 |
| Housing cost burden (≥30% income) | 23.5% | 23.7% (10.6–40.0%) n=32,322 | 27.0% (12.0–41.8%) n=457 |
| Homeownership rate | 84.0% | 78.7% (51.7–94.0%) n=32,322 | 82.1% (49.9–98.5%) n=457 |
| Crowded housing (>1 per room) | 0.4% | 1.3% (0.0–6.3%) n=32,322 | 0.7% (0.0–4.0%) n=457 |
| Foreign-born population | 18.9% | 2.6% (0.0–18.6%) n=32,553 | 6.2% (0.0–26.4%) n=464 |
| Single-parent households | 50.1% | 53.6% (37.3–74.1%) n=32,087 | 50.9% (34.0–73.3%) n=450 |
| Population 65+ | 17.5% | 19.4% (10.8–33.6%) n=32,553 | 18.0% (10.9–33.1%) n=464 |
| Median age | 40.1 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.8 yr (34.2–57.2) n=460 |
| Median household income | $128,069 | $72,070 ($46,039–$118,707) n=30,318 | $106,181 ($62,879–$172,423) n=419 |
| Median home value | $449,500 | $222,200 ($100,300–$579,820) n=30,049 | $423,400 ($215,180–$683,660) n=427 |
| Median gross rent | $1,935 | $1,021 ($677–$1,912) n=25,670 | $1,626 ($958–$2,415) n=339 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | MD median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 80.0 yr ± 0.77 | 78.9 yr (74.7–82.8) n=31,308 | 79.5 yr (75.7–82.7) n=451 |
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 0.77 years of 80.0, 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