ZIP code
03820
in Dover, New HampshirePopulation 33,440
61.80/ 100
Ranked #3,633 of 32,066 US ZIPs (top 11.4%)
Ranked #64 of 243 New Hampshire ZIPs (top 26%)
Ranked #161 of 281 Boston-Cambridge-Newton, MA-NH ZIPs (bottom 43%)
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.
Distance to a Superfund site
In this ZIP
at the national minimum
Higher is healthier
ST1stUS1stDefinition & source ›
The distance in miles from this ZIP’s edge to the nearest Superfund site — an abandoned or uncontrolled hazardous-waste site the EPA has listed for cleanup.
Full methodology ›Subsidized affordable housing
684 units
in the top 2.8% nationally
Higher is healthier
ST99thUS97thDefinition & source ›
The number of affordable rental units in this ZIP supported by the federal Low-Income Housing Tax Credit program.
Full methodology ›Transit access
4.2 per 1,000 residents
in the top 6.9% nationally
Higher is healthier
ST97thUS93rdDefinition & source ›
The number of public-transit stops 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 ›Diabetes
7.9%
in the bottom 4.0% nationally
Lower is healthier
ST5thUS4thDefinition & source ›
The estimated share of adults who have been diagnosed with diabetes.
Full methodology ›Mobility disability
9.1%
in the bottom 5.9% nationally
Lower is healthier
ST7thUS6thDefinition & source ›
The estimated share of adults with serious difficulty walking or climbing stairs.
Full methodology ›Fair or poor health
12.7%
in the bottom 5.1% nationally
Lower is healthier
ST16thUS5thDefinition & source ›
The estimated share of adults who rate their own general health as fair or poor.
Full methodology ›Short sleep
29.7%
in the bottom 8.3% nationally
Lower is healthier
ST8thUS8thDefinition & source ›
The estimated share of adults who usually sleep less than seven hours in a 24-hour period.
Full methodology ›Child-care access
0.55 per 1,000 residents
in the top 8.8% nationally
Higher is healthier
ST85thUS91stDefinition & source ›
The number of child day-care services 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 ›Recreation access
1 per 1,000 residents
in the top 8.8% nationally
Higher is healthier
ST83rdUS91stDefinition & source ›
The number of places for physical recreation — gyms, sports, and fitness venues — 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 ›Coronary heart disease
4.8%
in the bottom 7.8% nationally
Lower is healthier
ST5thUS8thDefinition & source ›
The estimated share of adults who have been told by a health professional that they have coronary heart disease or angina.
Full methodology ›The read
By the composite measure, Dover, New Hampshire (ZIP 03820) sits in the top 11.4% healthiest ZIPs nationally (3,633rd) and the top 26% of New Hampshire (64th).
The profile cuts both ways, and the readings bear that out: subsidized affordable housing is in the top 2.8% nationally. Distance to an emergency room rests at the national minimum, shared with about 11% of ZIPs. Transit sits in the top 6.9% nationally, and modeled diabetes registers in the bottom 4.0% nationally. Modeled mobility disability lands in the bottom 5.9% nationally, and fair or poor health resides in the bottom 5.1% nationally. Modeled short sleep lies in the bottom 8.3% nationally, and childcare settles in the top 8.8% nationally. Recreation stands in the top 8.8% nationally. Working the other way, distance to a Superfund site is at the national minimum.
Compared with the ZIPs that surround it, park land runs far higher than the surrounding ZIPs on this measure. In plain language, distance to a Superfund site is an abandoned or uncontrolled hazardous-waste site the EPA has identified for cleanup. Subsidized affordable housing is the main federal tax-credit program (HUD) funding affordable rental housing, counted as local units it supports. ZIP 03801, 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 Boston-Cambridge-Newton, MA-NH 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 86%
21%
Social Need / SDOH
healthier than 86%
16%
Preventive Care
healthier than 67%
13%
Risk Behavior
healthier than 92%
11%
Disability
healthier than 91%
7%
Healthcare Access
healthier than 77%
5%
About typical
Climate / Disaster Risk
healthier than 59%
5%
Holding it back
Environmental Hazard
healthier than 28%
14%
Mental Health
healthier than 38%
8%
Lifting this score
Chronic Disease Burden
healthier than 93%
21%
Social Need / SDOH
healthier than 87%
16%
Risk Behavior
healthier than 74%
11%
Disability
healthier than 90%
7%
Healthcare Access
healthier than 89%
5%
Holding it back
Environmental Hazard
healthier than 14%
14%
Preventive Care
healthier than 26%
13%
Mental Health
healthier than 14%
8%
Climate / Disaster Risk
healthier than 19%
5%
Lifting this score
Chronic Disease Burden
healthier than 63%
21%
Risk Behavior
healthier than 69%
11%
Healthcare Access
healthier than 67%
5%
About typical
Social Need / SDOH
healthier than 56%
16%
Environmental Hazard
healthier than 44%
14%
Disability
healthier than 57%
7%
Climate / Disaster Risk
healthier than 52%
5%
Holding it back
Preventive Care
healthier than 17%
13%
Mental Health
healthier than 23%
8%
“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 28.4; chronic-disease standing 86.3 — 58 points apart, heavier on the environment than it is on chronic illness.
Ranked #15,210 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
03801
New Hampshireshares a border
Score 66.45
Closest healthier
03823
New Hampshireshares a border
Score 63.14
Similar health profile
28115
North Carolina98% similar profile
Score 60.18
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 | 25.0% | 22.8–27.5 |
| High blood pressure among adults | 29.8% | 27.1–32.8 |
| Cancer (non-skin) or melanoma among adults | 8.6% | 7.9–9.4 |
| Current asthma among adults | 10.5% | 9.3–11.8 |
| Coronary heart disease among adults | 4.8% | 4.3–5.4 |
| Chronic obstructive pulmonary disease among adults | 5.2% | 4.6–5.9 |
| Depression among adults | 25.5% | 22.5–28.8 |
| Diagnosed diabetes among adults | 7.9% | 6.9–9.1 |
| High cholesterol among adults who have ever been screened | 34.0% | 31.0–37.2 |
| Obesity among adults | 31.8% | 27.3–36.7 |
| Stroke among adults | 2.6% | 2.3–2.8 |
| All teeth lost among adults aged >=65 years | 8.5% | 6.9–10.3 |
PreventionCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Current lack of health insurance among adults aged 18-64 years | 6.2% | 5.2–7.4 |
| Taking medicine to control high blood pressure among adults with high blood pressure | 72.2% | 69.2–75.0 |
| Visits to doctor for routine checkup within the past year among adults | 77.0% | 73.7–80.1 |
| Cholesterol screening among adults | 87.1% | 85.2–88.7 |
| Colorectal cancer screening among adults aged 45–75 years | 69.0% | 65.1–72.8 |
| Visited dentist or dental clinic in the past year among adults | 69.8% | 66.8–72.8 |
| Mammography use among women aged 50-74 years | 79.1% | 73.7–84.0 |
Health Risk BehaviorsCDC PLACES 2022 / 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Binge drinking among adults | 16.8% | 14.3–19.7 |
| Current cigarette smoking among adults | 9.5% | 8.1–11.1 |
| No leisure-time physical activity among adults | 17.7% | 15.1–20.6 |
| Short sleep duration among adults | 29.7% | 25.7–34.0 |
Health StatusCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Fair or poor self-rated health status among adults | 12.7% | 11.1–14.4 |
| Frequent mental distress among adults | 16.4% | 14.6–18.3 |
| Frequent physical distress among adults | 10.3% | 9.1–11.5 |
DisabilityCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Cognitive disability among adults | 11.4% | 10.0–12.8 |
| Any disability among adults | 23.7% | 20.9–26.7 |
| Hearing disability among adults | 6.3% | 5.6–7.1 |
| Independent living disability among adults | 5.9% | 5.3–6.7 |
| Mobility disability among adults | 9.1% | 7.9–10.4 |
| Self-care disability among adults | 2.4% | 2.2–2.7 |
| Vision disability among adults | 3.3% | 3.0–3.7 |
Health-Related Social NeedsCDC PLACES 2023 · BRFSS
| Measure | Crude prevalence | 95% CI |
|---|---|---|
| Lack of social and emotional support among adults | 21.9% | 19.3–24.8 |
| Food insecurity in the past 12 months among adults | 8.9% | 7.5–10.4 |
| Received food stamps in the past 12 months among adults | 6.1% | 5.0–7.3 |
| Housing insecurity in the past 12 months among adults | 8.1% | 6.9–9.4 |
| Lack of reliable transportation in the past 12 months among adults | 5.5% | 4.8–6.2 |
| Loneliness among adults | 33.3% | 29.8–37.0 |
| Utility services shut-off threat in the past 12 months among adults | 5.4% | 4.6–6.2 |
Community & economyCensus ACS 5-Year · 2024 release · observed
| Measure | Value | US median (p10–p90) | NH median (p10–p90) |
|---|---|---|---|
| Poverty rate | 8.3% | 10.6% (3.1–25.8%) n=32,364 | 6.7% (2.0–13.3%) n=243 |
| Uninsured 18–64 | 8.5% | 9.0% (1.5–24.3%) n=32,286 | 7.1% (2.2–14.5%) n=242 |
| No HS diploma (25+) | 3.2% | 7.9% (1.8–20.7%) n=32,505 | 4.5% (1.3–9.8%) n=243 |
| Bachelor's or higher (25+) | 52.0% | 23.3% (9.2–53.6%) n=32,505 | 38.8% (21.4–60.3%) n=243 |
| Unemployment rate (16+) | 4.1% | 3.9% (0.0–9.8%) n=32,274 | 2.8% (0.0–6.0%) n=243 |
| Households without a vehicle | 5.0% | 3.9% (0.0–12.5%) n=32,322 | 2.5% (0.0–8.4%) n=243 |
| Broadband subscription | 95.4% | 89.3% (75.1–97.1%) n=32,322 | 92.9% (85.7–99.0%) n=243 |
| Housing cost burden (≥30% income) | 36.4% | 23.7% (10.6–40.0%) n=32,322 | 27.1% (17.2–36.4%) n=243 |
| Homeownership rate | 52.7% | 78.7% (51.7–94.0%) n=32,322 | 86.0% (62.6–96.9%) n=243 |
| Crowded housing (>1 per room) | 2.3% | 1.3% (0.0–6.3%) n=32,322 | 0.7% (0.0–3.1%) n=243 |
| Foreign-born population | 6.0% | 2.6% (0.0–18.6%) n=32,553 | 3.1% (0.5–7.1%) n=243 |
| Single-parent households | 54.1% | 53.6% (37.3–74.1%) n=32,087 | 60.9% (46.9–76.5%) n=243 |
| Population 65+ | 16.8% | 19.4% (10.8–33.6%) n=32,553 | 22.1% (15.1–37.1%) n=243 |
| Median age | 36.9 yr | 42.2 yr (33.0–56.3) n=32,292 | 47.1 yr (38.4–58.4) n=243 |
| Median household income | $94,897 | $72,070 ($46,039–$118,707) n=30,318 | $98,684 ($67,733–$147,723) n=235 |
| Median home value | $436,100 | $222,200 ($100,300–$579,820) n=30,049 | $371,500 ($252,560–$570,440) n=237 |
| Median gross rent | $1,607 | $1,021 ($677–$1,912) n=25,670 | $1,360 ($1,037–$1,893) n=197 |
Life expectancyNCHS / RWJF USALEEP · model-based
| Measure | Value | US median (p10–p90) | NH median (p10–p90) |
|---|---|---|---|
| Life expectancy at birth | 78.7 yr ± 0.59 | 78.9 yr (74.7–82.8) n=31,308 | 81.2 yr (78.0–85.7) n=242 |
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 0.59 years of 78.7, 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