ZIP code
21403
in Annapolis, MarylandPopulation 32,681
64.37/ 100
Ranked #2,259 of 32,066 US ZIPs (top 7.1%)
Ranked #100 of 458 Maryland ZIPs (top 22%)
Ranked #50 of 157 Baltimore-Columbia-Towson, MD ZIPs (top 32%)
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.
Mammography
84.6%
in the top 0.8% nationally
Higher is healthier
ST97thUS99thDefinition & source ›
The estimated share of women aged 50–74 who had a mammogram within the past two years.
Full methodology ›PFAS in drinking water
71.6%
in the top 4.0% nationally
Lower is healthier
ST97thUS96thDefinition & 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 ›Fatal road crashes
1.5 per 100,000 residents per year
in the bottom 5.5% nationally
Lower is healthier
ST6thUS5thDefinition & source ›
The annual rate of fatal road crashes per 100,000 residents, pooled over a ten-year window.
A rate per resident population. Where a ZIP has too few residents for the rate to be reliable — about 30% of US ZIPs — no value is published rather than an unstable one; those ZIPs are absent from this comparison, not counted as crash-free.
Full methodology ›Lead in tap water
6.1 ppb
in the top 7.5% nationally
Lower is healthier
US93rdDefinition & source ›
The lead level at the 90th percentile of tap-water samples reported by the public water systems serving this ZIP, in parts per billion — the EPA requires action above 15 ppb.
Measured from EPA records for the public water systems that serve this ZIP. Households on private wells — roughly 30% of the US population — are not covered by this measure, and this figure says nothing about their water.
Full methodology ›Subsidized affordable housing
318 units
in the top 7.7% nationally
Higher is healthier
ST86thUS92ndDefinition & source ›
The number of affordable rental units in this ZIP supported by the federal Low-Income Housing Tax Credit program.
Full methodology ›Median household income
$123,329
in the top 8.6% nationally
Higher is healthier
ST64thUS91stDefinition & source ›
The middle household income in this ZIP — half of households earn more, half earn less — in dollars per year.
Full methodology ›Energy-cost burden
1.8%
in the bottom 8.7% nationally
Lower is healthier
ST22ndUS9thDefinition & source ›
The modeled share of household income spent on home energy bills — electricity, gas, and heating fuels.
A modeled share of household income spent on home energy. Estimates that hit the model’s 100% ceiling are suppressed rather than published, because at that point the figure reflects the model’s limit rather than a measured burden.
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 ›Colon-cancer screening
72.6%
in the top 8.5% nationally
Higher is healthier
ST77thUS92ndDefinition & source ›
The estimated share of adults aged 45–75 who are up to date on colorectal-cancer screening.
Full methodology ›The read
By the composite health measure, ZIP 21403, one of several in Annapolis, Maryland ranks in the top 7.1% healthiest ZIPs nationally (2,259th) and the top 22% of Maryland (100th).
The picture here is genuinely mixed, with readings on both sides: modeled mammography lies in the top 0.8% nationally, and fatal road crashes lands in the bottom 5.5% nationally. Subsidized affordable housing sits in the top 7.7% nationally, and household income is in the top 8.6% nationally. Modeled energy burden settles in the bottom 8.7% nationally, independent living disability resides in the bottom 8.3% nationally, and colon screening registers in the top 8.5% nationally. Modeled cognitive disability rests in the bottom 10.2% nationally. On the other side, modeled pfas stands in the top 4.0% nationally, and lead in tap water lies in the top 7.5% nationally.
Read against the ZIPs closest to it, park land runs far higher than the surrounding ZIPs on this measure. To spell things out, 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. Lead in tap water is the EPA trigger, 15 parts per billion in tap samples, above which a water system must act on lead. Subsidized affordable housing is the main federal tax-credit program (HUD) funding affordable rental housing, counted as local units it supports. Close by, ZIP 21401, 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 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 79%
21%
Social Need / SDOH
healthier than 90%
16%
Environmental Hazard
healthier than 62%
14%
Preventive Care
healthier than 92%
13%
Risk Behavior
healthier than 81%
11%
Mental Health
healthier than 90%
8%
Disability
healthier than 90%
7%
About typical
Healthcare Access
healthier than 47%
5%
Holding it back
Climate / Disaster Risk
healthier than 39%
5%
Lifting this score
Chronic Disease Burden
healthier than 74%
21%
Social Need / SDOH
healthier than 74%
16%
Preventive Care
healthier than 76%
13%
Risk Behavior
healthier than 63%
11%
Mental Health
healthier than 76%
8%
Disability
healthier than 72%
7%
About typical
Environmental Hazard
healthier than 48%
14%
Healthcare Access
healthier than 43%
5%
Holding it back
Climate / Disaster Risk
healthier than 25%
5%
Lifting this score
Chronic Disease Burden
healthier than 66%
21%
Environmental Hazard
healthier than 74%
14%
Preventive Care
healthier than 67%
13%
Mental Health
healthier than 83%
8%
About typical
Social Need / SDOH
healthier than 58%
16%
Risk Behavior
healthier than 55%
11%
Disability
healthier than 55%
7%
Healthcare Access
healthier than 44%
5%
Holding it back
Climate / Disaster Risk
healthier than 17%
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 ›
Nearby & similar ZIPs
Editorially selected — see how this ZIP compares to nearby and similar places.
Nearby
21037
Marylandshares a border
Score 63.01
Closest healthier
21401
Marylandshares a border
Score 66.17
Similar health profile
52333
Iowa100% similar profile
Score 65.13
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 | 26.1% | 24.0–28.3 |
| High blood pressure among adults | 34.4% | 31.8–37.0 |
| Cancer (non-skin) or melanoma among adults | 9.5% | 8.7–10.3 |
| Current asthma among adults | 9.8% | 8.8–10.9 |
| Coronary heart disease among adults | 5.5% | 4.9–6.1 |
| Chronic obstructive pulmonary disease among adults | 5.1% | 4.5–5.7 |
| Depression among adults | 19.6% | 17.4–21.9 |
| Diagnosed diabetes among adults | 10.3% | 9.2–11.6 |
| High cholesterol among adults who have ever been screened | 36.6% | 33.9–39.4 |
| Obesity among adults | 33.4% | 29.7–37.3 |
| Stroke among adults | 2.9% | 2.7–3.1 |
| All teeth lost among adults aged >=65 years | 7.9% | 6.5–9.4 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 8.4% | 7.2–9.7 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 76.4% | 73.9–78.7 |
| Visits to doctor for routine checkup within the past year among adults | 80.1% | 77.6–82.4 |
| Cholesterol screening among adults | 90.7% | 89.5–91.8 |
| Colorectal cancer screening among adults aged 45–75 years | 72.6% | 69.5–75.7 |
| Visited dentist or dental clinic in the past year among adults | 69.3% | 66.7–71.7 |
| Mammography use among women aged 50-74 years | 84.6% | 80.7–88.1 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 16.0% | 13.9–18.3 |
| Current cigarette smoking among adults | 9.3% | 8.1–10.6 |
| No leisure-time physical activity among adults | 19.8% | 17.4–22.4 |
| Short sleep duration among adults | 36.3% | 32.7–39.8 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 15.9% | 14.1–17.6 |
| Frequent mental distress among adults | 13.5% | 12.1–15.0 |
| Frequent physical distress among adults | 11.5% | 10.3–12.8 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 11.0% | 9.8–12.3 |
| Any disability among adults | 25.6% | 23.0–28.2 |
| Hearing disability among adults | 5.7% | 5.1–6.3 |
| Independent living disability among adults | 5.9% | 5.3–6.6 |
| Mobility disability among adults | 11.1% | 9.8–12.3 |
| Self-care disability among adults | 2.7% | 2.5–3.0 |
| Vision disability among adults | 3.6% | 3.3–4.0 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 20.4% | 18.0–23.0 |
| Food insecurity in the past 12 months among adults | 11.0% | 9.6–12.5 |
| Received food stamps in the past 12 months among adults | 7.6% | 6.6–8.8 |
| Housing insecurity in the past 12 months among adults | 9.7% | 8.5–11.1 |
| Lack of reliable transportation in the past 12 months among adults | 5.7% | 5.0–6.4 |
| Loneliness among adults | 32.0% | 28.8–35.5 |
| Utility services shut-off threat in the past 12 months among adults | 5.8% | 5.0–6.6 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | MD median (p10–p90) |
|---|---|---|---|
| Poverty rate | 5.8% | 10.6% (3.1–25.8%) n=32,364 | 6.7% (1.1–19.3%) n=459 |
| Uninsured 18–64 | 9.1% | 9.0% (1.5–24.3%) n=32,286 | 4.8% (0.0–13.1%) n=459 |
| No HS diploma (25+) | 9.6% | 7.9% (1.8–20.7%) n=32,505 | 6.3% (0.5–16.6%) n=463 |
| Bachelor's or higher (25+) | 56.4% | 23.3% (9.2–53.6%) n=32,505 | 37.3% (15.0–64.4%) n=463 |
| Unemployment rate (16+) | 2.6% | 3.9% (0.0–9.8%) n=32,274 | 3.9% (0.0–8.6%) n=457 |
| Households without a vehicle | 6.2% | 3.9% (0.0–12.5%) n=32,322 | 3.2% (0.0–12.4%) n=457 |
| Broadband subscription | 95.8% | 89.3% (75.1–97.1%) n=32,322 | 93.3% (81.2–100.0%) n=457 |
| Housing cost burden (≥30% income) | 30.5% | 23.7% (10.6–40.0%) n=32,322 | 27.0% (12.0–41.8%) n=457 |
| Homeownership rate | 69.1% | 78.7% (51.7–94.0%) n=32,322 | 82.1% (49.9–98.5%) n=457 |
| Crowded housing (>1 per room) | 0.9% | 1.3% (0.0–6.3%) n=32,322 | 0.7% (0.0–4.0%) n=457 |
| Foreign-born population | 9.8% | 2.6% (0.0–18.6%) n=32,553 | 6.2% (0.0–26.4%) n=464 |
| Single-parent households | 53.0% | 53.6% (37.3–74.1%) n=32,087 | 50.9% (34.0–73.3%) n=450 |
| Population 65+ | 22.2% | 19.4% (10.8–33.6%) n=32,553 | 18.0% (10.9–33.1%) n=464 |
| Median age | 45.3 yr | 42.2 yr (33.0–56.3) n=32,292 | 41.8 yr (34.2–57.2) n=460 |
| Median household income | $123,329 | $72,070 ($46,039–$118,707) n=30,318 | $106,181 ($62,879–$172,423) n=419 |
| Median home value | $582,500 | $222,200 ($100,300–$579,820) n=30,049 | $423,400 ($215,180–$683,660) n=427 |
| Median gross rent | $1,942 | $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 | 80.6 yr ± 0.69 | 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 0.69 years of 80.6, 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