Dover, NH · standard
ZIP Code 03820
Strafford County, New Hampshire - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 30,039
- 418/sq mi High-density area
- $94,897
- Median income Above-median income area
- $436,100
- Median home value Above-median home value
- 52.0%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Dover pairs an upper-quartile household income with upper-quartile home values, in a low-density, mixed-tenure area.
- Top 23%
- household income, US ZIPs
- Top 17%
- home value, US ZIPs
- 418
- people per sq mi
- 53%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 03820 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 03820 (Dover, NH) rose +8.0% from 2023 to 2024. The all-transactions index moved from 278.9 in 2023 to 301.3 in 2024 (2000 = 100).
ZIP code 03820 is a densely settled ZIP (a standard USPS delivery area) in Dover, Strafford County, New Hampshire, with 30,039 residents across 71.9 square miles, a density of 418 people per square mile, in the New York time zone.
ZIP 03820 lands in the middle-income range, with a median household income of $94,897 (7% below the average New Hampshire ZIP), while per-capita income is $52,784. The poverty rate is 8.3%, with unemployment at 4.1%; those measures add context to the income figure. Median home value is $436,100 (8% above the average New Hampshire ZIP) and median rent is $1,607; 52.7% of occupied homes are owner-occupied.
This is a highly-educated ZIP: 52.0% of adults hold a bachelor's degree or higher, the median age is 36.9, and the average commute is 23 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Strafford County, so 03820 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 03820
Top 5 sectors by establishment count in Dover, NH
Which industries have the most business establishments in ZIP 03820.
- Health care and social assistance
Health care and social assistance
146 establishments
- Accommodation and food services
Accommodation and food services
113 establishments
- Retail trade
Retail trade
97 establishments
- Other services (except public administration)
Other services (except public administration)
89 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
84 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 03820, Dover, NH · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
30,039
Population
71.9
Area (sq mi)
418
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 03820?
36.9
Median Age
49.5%
Male
50.5%
Female
6.0%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$94,897
Median Household Income
-7% vs state ZIP avg
$52,784
Per Capita Income
8.3%
Poverty Rate
4.1%
Unemployment Rate
22.8 min
Mean Commute Time
How ZIP 03820 ranks nationally
Dover, NH household income vs. every US ZIP code
Median household income, the full national distribution, with this ZIP marked
$94,897 Top 23% higher than 77% of 30,318 US ZIPs
Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
15,453housing units
15,453
Total Housing Units
15,062
Occupied Units
391
Vacant Units
2.16
Avg Household Size
Occupancy Type
$436,100
Median Home Value
+8% vs state ZIP avg
$1,607
Median Rent
1976
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+8.0%
YoY Change (2024)
301
HPI Index (2000 = 100)
+201%
Total Change Since 2000
Home values in ZIP 03820 have increased 8.0% over the past year (2024). Since 2000, this ZIP has seen +201% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +4.4% | 190 |
| 2021 | +13.9% | 217 |
| 2022 | +15.8% | 251 |
| 2023 | +11.2% | 279 |
| 2024 | +8.0% | 301 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 902 business establishments in ZIP 03820, employing approximately 16,911 people with a combined annual payroll of $1,053,613,000.
902
Businesses
16,911
Employees
$1.1B
Annual Payroll
16
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Health care and social assistance | 146 | 16.2% |
| Accommodation and food services | 113 | 12.5% |
| Retail trade | 97 | 10.8% |
| Other services (except public administration) | 89 | 9.9% |
| Professional, scientific, and technical services | 84 | 9.3% |
| Construction | 76 | 8.4% |
| Administrative and support and waste management and remediation services | 59 | 6.5% |
| Finance and insurance | 53 | 5.9% |
| Manufacturing | 42 | 4.7% |
| Wholesale trade | 36 | 4.0% |
| Real estate and rental and leasing | 32 | 3.5% |
| Information | 17 | 1.9% |
| Educational services | 17 | 1.9% |
| Arts, entertainment, and recreation | 17 | 1.9% |
| Transportation and warehousing | 13 | 1.4% |
| Management of companies and enterprises | 8 | 0.9% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 03820 vs 03878 →
ZIP 03820 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 03820
Dover (03820)
30,039 residents
- 03824
Durham (03824)
14,638 residents
- 03878 11,824
Somersworth (03878)
11,824 residents
- 03857 9,006
Newmarket (03857)
9,006 residents
- 03901 7,246
Berwick (03901)
7,246 residents
- 03908 7,233
South Berwick (03908)
7,233 residents
- 03903 6,211
Eliot (03903)
6,211 residents
- 03868 5,323
Rochester (03868)
5,323 residents
- 03839 3,735
Rochester (03839)
3,735 residents
What this shows Among its immediate neighbors, ZIP 03820 ranks the most populous - useful context the national average alone can't give.
ZIP 03820 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 03823
Madbury (03823)
$148,365 median income
- 03824
Durham (03824)
$124,056 median income
- 03903
Eliot (03903)
$101,522 median income
- 03857
Newmarket (03857)
$100,845 median income
- 03908
South Berwick (03908)
$98,289 median income
- 03820
Dover (03820)
$94,897 median income
- 03901
Berwick (03901)
$94,771 median income
- 03839
Rochester (03839)
$88,346 median income
- 03869
Rollinsford (03869)
$87,215 median income
What this shows By household income, ZIP 03820 ranks #6 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 03878 | Somersworth, NH | 11,824 | 4.4 mi |
| 03823 | Madbury, NH | 1,719 | 2.9 mi |
| 03869 | Rollinsford, NH | 2,469 | 3.2 mi |
| 03824 | Durham, NH | 14,638 | 5.2 mi |
| 03903 | Eliot, ME | 6,211 | 5.8 mi |
| 03901 | Berwick, ME | 7,246 | 8.0 mi |
| 03839 | Rochester, NH | 3,735 | 7.0 mi |
| 03857 | Newmarket, NH | 9,006 | 8.9 mi |
| 03868 | Rochester, NH | 5,323 | 9.5 mi |
| 03908 | South Berwick, ME | 7,233 | 7.8 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 03820, both outside NH so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (30,039 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Strafford County
Related Areas
Frequently Asked Questions
What county is ZIP code 03820 in?
ZIP code 03820 (Dover) is located in Strafford County, New Hampshire. Strafford County contains multiple ZIP codes, see the full list at /counties/strafford-nh.
What is the population of ZIP code 03820?
ZIP code 03820 in Dover, NH has a population of 30,039 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 03820?
The median household income in ZIP 03820 is $94,897, which is 24% above the national average of $76,288.
What is the average home value in ZIP 03820?
The median home value in ZIP 03820 is $436,100, which is 57% above the national average of $278,155.
What is the demographic makeup of ZIP 03820?
The largest racial group in ZIP 03820 is White at 86.3%. Hispanic or Latino residents make up 3.5% of the population.
How many businesses are in ZIP code 03820?
ZIP code 03820 has 902 business establishments employing approximately 16,911 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 03820?
The top industries by establishment count in ZIP 03820 are: Health care and social assistance (146), Accommodation and food services (113), Retail trade (97). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 03820?
According to the FHFA House Price Index, home values in ZIP 03820 increased by 8.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 201%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 03820?
In ZIP code 03820, 71.6% of residents aged 25+ have a high school diploma or higher, and 52.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 03820?
The mean commute time for workers in ZIP code 03820 is 22.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 03820?
In ZIP code 03820, approximately 52.7% of occupied housing units are owner-occupied and 47.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 03820?
The poverty rate in ZIP code 03820 is 8.3% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 03820's numbers, next.
- See how ZIP 03820 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Dover, NH ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.