ZIP code
20818
in Cabin John, MarylandPopulation 1,539
74.07/ 100
Ranked #87 of 32,066 US ZIPs (top 0.3%)
Ranked #9 of 458 Maryland ZIPs (top 2.0%)
Ranked #15 of 308 Washington-Arlington-Alexandria, DC-VA-MD-WV ZIPs (top 4.9%)
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
$245,982
in the top 0.5% nationally
Higher is healthier
ST98thUS99thDefinition & source ›
The middle household income in this ZIP — half of households earn more, half earn less — in dollars per year.
Full methodology ›Lack of transportation
3.0%
in the bottom 0.06% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults who lacked reliable transportation in the past 12 months.
Full methodology ›Food insecurity
4.7%
in the bottom 0.2% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults who experienced food insecurity in the past 12 months.
Full methodology ›Utility shut-off threat
2.8%
in the bottom 0.3% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults whose household was threatened with a utility shut-off in the past 12 months.
Full methodology ›Housing insecurity
4.6%
in the bottom 0.3% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults who experienced housing insecurity in the past 12 months.
Full methodology ›Mental-health provider access
0.55 per 1,000 residents
in the top 0.8% nationally
Higher is healthier
ST99thUS99thDefinition & source ›
The number of mental-health clinics located inside this ZIP’s boundary, per 1,000 residents.
Counted from establishments located inside this ZIP’s boundary, so one just across the line is not counted. Where a ZIP has too few residents for the density to be reliable, no value is published rather than an unreliable one.
Full methodology ›Cognitive disability
7.0%
in the bottom 0.10% nationally
Lower is healthier
ST1stUS1stDefinition & source ›
The estimated share of adults with serious difficulty concentrating, remembering, or making decisions.
Full methodology ›Obesity
22.7%
in the bottom 2.7% nationally
Lower is healthier
ST2ndUS3rdDefinition & source ›
The estimated share of adults with obesity, defined as a body-mass index of 30 or higher.
Full methodology ›Outpatient-care access
1.1 per 1,000 residents
in the top 1.6% nationally
Higher is healthier
ST99thUS98thDefinition & source ›
The number of outpatient clinics located inside this ZIP’s boundary, per 1,000 residents.
Counted from establishments located inside this ZIP’s boundary, so one just across the line is not counted. Where a ZIP has too few residents for the density to be reliable, no value is published rather than an unreliable one.
Full methodology ›Independent-living disability
3.7%
in the bottom 0.08% nationally
Lower is healthier
ST1stUS1stDefinition & 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 ›The read
On the composite measure, Cabin John, Maryland (ZIP 20818) stands in the top 0.3% healthiest ZIPs nationally (87th) and the top 2.0% of Maryland (9th).
A profile of give and take, with clear readings each way: household income resides in the top 0.5% nationally, and modeled transportation stands in the bottom 0.06% nationally. Modeled food insecurity sits in the bottom 0.2% nationally, and utility shutoff resides in the bottom 0.3% nationally. Modeled housing insecurity stands in the bottom 0.3% nationally, mental-health providers sits in the top 0.8% nationally, and modeled cognitive disability resides in the bottom 0.10% nationally. Modeled obesity stands in the bottom 2.7% nationally, outpatient sits in the top 1.6% nationally, and modeled independent living disability resides in the bottom 0.08% nationally.
Set beside the wider area around it, mental-health providers runs far higher than the surrounding ZIPs on this measure. ZIP 20817, just across the boundary, ranks better overall among the ZIPs nearby. Beyond the headline readings, the area also sits on the healthier half of the national range on at least seven of the ten good-life measures tracked here, from quiet and green space to nearby care, a combination reached by about one in twenty-five US ZIP codes.
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 Washington-Arlington-Alexandria, DC-VA-MD-WV 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 88%
21%
Social Need / SDOH
in the top 0.2%
16%
Preventive Care
healthier than 99%
13%
Risk Behavior
in the top 0.4%
11%
Mental Health
in the top 0.7%
8%
Disability
in the top 0.6%
7%
About typical
Healthcare Access
healthier than 49%
5%
Holding it back
Environmental Hazard
healthier than 34%
14%
Climate / Disaster Risk
healthier than 12%
5%
Lifting this score
Chronic Disease Burden
healthier than 88%
21%
Social Need / SDOH
in the top 0.5%
16%
Preventive Care
healthier than 97%
13%
Risk Behavior
in the top 0.5%
11%
Mental Health
healthier than 99%
8%
Disability
healthier than 99%
7%
About typical
Healthcare Access
healthier than 44%
5%
Holding it back
Environmental Hazard
healthier than 16%
14%
Climate / Disaster Risk
healthier than 5%
5%
Lifting this score
Chronic Disease Burden
healthier than 61%
21%
Social Need / SDOH
in the top 0.7%
16%
Preventive Care
in the top 0.00%
13%
Risk Behavior
in the top 0.7%
11%
Mental Health
in the top 0.7%
8%
Disability
healthier than 96%
7%
Holding it back
Environmental Hazard
healthier than 21%
14%
Climate / Disaster Risk
healthier than 2%
5%
Healthcare Access
healthier than 28%
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.
Heavy environment, light chronic burden
Where the environment and chronic illness point in opposite directions
Environmental-hazard standing 34.3; chronic-disease standing 87.6 — 53 points apart, heavier on the environment than it is on chronic illness.
Ranked #14,729 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
20812
Marylandshares a border
Score 71.99
Closest healthier
20817
Marylandshares a border
Score 75.41
Similar health profile
75225
Texas99% similar profile
Score 69.31
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 | 24.1% | 21.9–26.3 |
| High blood pressure among adults | 32.1% | 29.5–34.6 |
| Cancer (non-skin) or melanoma among adults | 10.7% | 9.8–11.7 |
| Current asthma among adults | 8.8% | 7.9–9.8 |
| Coronary heart disease among adults | 5.2% | 4.5–5.9 |
| Chronic obstructive pulmonary disease among adults | 3.8% | 3.1–4.8 |
| Depression among adults | 17.4% | 15.4–19.3 |
| Diagnosed diabetes among adults | 8.9% | 7.8–10.1 |
| High cholesterol among adults who have ever been screened | 45.0% | 42.2–47.6 |
| Obesity among adults | 22.7% | 19.7–25.7 |
| Stroke among adults | 2.5% | 2.2–2.9 |
| All teeth lost among adults aged >=65 years | 2.5% | 2.1–3.1 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 3.8% | 3.0–5.0 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 78.6% | 76.0–81.0 |
| Visits to doctor for routine checkup within the past year among adults | 80.1% | 77.9–82.0 |
| Cholesterol screening among adults | 94.0% | 93.0–94.8 |
| Colorectal cancer screening among adults aged 45–75 years | 76.9% | 74.3–79.3 |
| Visited dentist or dental clinic in the past year among adults | 78.9% | 77.1–80.7 |
| Mammography use among women aged 50-74 years | 81.6% | 77.6–85.2 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 14.2% | 12.5–15.9 |
| Current cigarette smoking among adults | 4.7% | 3.5–6.3 |
| No leisure-time physical activity among adults | 12.8% | 10.7–15.2 |
| Short sleep duration among adults | 27.9% | 25.3–30.6 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 10.4% | 8.7–12.4 |
| Frequent mental distress among adults | 9.6% | 8.4–11.0 |
| Frequent physical distress among adults | 8.9% | 7.7–10.3 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 7.0% | 5.8–8.3 |
| Any disability among adults | 17.8% | 15.4–20.5 |
| Hearing disability among adults | 5.3% | 4.6–6.0 |
| Independent living disability among adults | 3.7% | 3.1–4.5 |
| Mobility disability among adults | 7.5% | 6.3–9.1 |
| Self-care disability among adults | 1.9% | 1.6–2.3 |
| Vision disability among adults | 2.4% | 2.1–2.9 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 16.2% | 14.1–18.5 |
| Food insecurity in the past 12 months among adults | 4.7% | 3.6–6.2 |
| Received food stamps in the past 12 months among adults | 2.6% | 1.9–3.7 |
| Housing insecurity in the past 12 months among adults | 4.6% | 3.7–5.7 |
| Lack of reliable transportation in the past 12 months among adults | 3.0% | 2.5–3.6 |
| Loneliness among adults | 27.4% | 24.5–30.5 |
| Utility services shut-off threat in the past 12 months among adults | 2.8% | 2.3–3.4 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | MD median (p10–p90) |
|---|---|---|---|
| Poverty rate | 1.1% | 10.6% (3.1–25.8%) n=32,364 | 6.7% (1.1–19.3%) n=459 |
| Uninsured 18–64 | 2.9% | 9.0% (1.5–24.3%) n=32,286 | 4.8% (0.0–13.1%) n=459 |
| No HS diploma (25+) | 1.1% | 7.9% (1.8–20.7%) n=32,505 | 6.3% (0.5–16.6%) n=463 |
| Bachelor's or higher (25+) | 86.4% | 23.3% (9.2–53.6%) n=32,505 | 37.3% (15.0–64.4%) n=463 |
| Unemployment rate (16+) | 0.0% | 3.9% (0.0–9.8%) n=32,274 | 3.9% (0.0–8.6%) n=457 |
| Households without a vehicle | 2.7% | 3.9% (0.0–12.5%) n=32,322 | 3.2% (0.0–12.4%) n=457 |
| Broadband subscription | 100.0% | 89.3% (75.1–97.1%) n=32,322 | 93.3% (81.2–100.0%) n=457 |
| Housing cost burden (≥30% income) | 24.8% | 23.7% (10.6–40.0%) n=32,322 | 27.0% (12.0–41.8%) n=457 |
| Homeownership rate | 95.3% | 78.7% (51.7–94.0%) n=32,322 | 82.1% (49.9–98.5%) n=457 |
| Crowded housing (>1 per room) | 0.0% | 1.3% (0.0–6.3%) n=32,322 | 0.7% (0.0–4.0%) n=457 |
| Foreign-born population | 15.8% | 2.6% (0.0–18.6%) n=32,553 | 6.2% (0.0–26.4%) n=464 |
| Single-parent households | 51.8% | 53.6% (37.3–74.1%) n=32,087 | 50.9% (34.0–73.3%) n=450 |
| Population 65+ | 23.6% | 19.4% (10.8–33.6%) n=32,553 | 18.0% (10.9–33.1%) n=464 |
| Median age | 52.7 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.8 yr (34.2–57.2) n=460 |
| Median household income | $245,982 | $72,070 ($46,039–$118,707) n=30,318 | $106,181 ($62,879–$172,423) n=419 |
| Median home value | $1,335,100 | $222,200 ($100,300–$579,820) n=30,049 | $423,400 ($215,180–$683,660) n=427 |
| Median gross rent | — | $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 | 93.6 yr ± 3.42 | 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 3.42 years of 93.6, 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