Newmarket, NH · standard
ZIP Code 03857
Rockingham County, New Hampshire - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 9,006
- 275/sq mi High-density area
- $100,845
- Median income Above-median income area
- $455,000
- Median home value Above-median home value
- 49.7%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Newmarket pairs an upper-quartile household income with upper-quartile home values, in a low-density, mixed-tenure area.
- Top 19%
- household income, US ZIPs
- Top 16%
- home value, US ZIPs
- 275
- people per sq mi
- 53%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 03857 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 03857 (Newmarket, NH) rose +7.3% from 2023 to 2024. The all-transactions index moved from 262.5 in 2023 to 281.6 in 2024 (2000 = 100).
ZIP code 03857 is a mid-sized community (a standard USPS delivery area) in Newmarket, Rockingham County, New Hampshire, home to 9,006 residents across 32.7 square miles, a density of 275 people per square mile, in the New York time zone.
ZIP 03857 lands in the middle-income range, with a median household income of $100,845 (1% below the average New Hampshire ZIP), while per-capita income is $58,507. Both reported hardship measures are comparatively low in absolute terms: poverty is 4.6% and unemployment is 1.0%. Median home value is $455,000 (12% above the average New Hampshire ZIP) and median rent is $1,671; 52.9% of occupied homes are owner-occupied.
A solid share of residents have a four-year degree: 49.7% of adults hold a bachelor's degree or higher, the median age is 41.2, and the average commute is 28 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Rockingham County, so 03857 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 03857
Top 5 sectors by establishment count in Newmarket, NH
Which industries have the most business establishments in ZIP 03857.
- Professional, scientific, and technical services
Professional, scientific, and technical services
19 establishments
- Other services (except public administration)
Other services (except public administration)
18 establishments
- Accommodation and food services
Accommodation and food services
17 establishments
- Construction
Construction
16 establishments
- Health care and social assistance
Health care and social assistance
16 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 03857, Newmarket, 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
9,006
Population
32.7
Area (sq mi)
275
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 03857?
41.2
Median Age
49.4%
Male
50.6%
Female
5.0%
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?
$100,845
Median Household Income
-1% vs state ZIP avg
$58,507
Per Capita Income
4.6%
Poverty Rate
1.0%
Unemployment Rate
28.2 min
Mean Commute Time
How ZIP 03857 ranks among New Hampshire ZIPs
Newmarket, NH household income vs. every New Hampshire ZIP code
Median household income among 236 reporting New Hampshire ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$100,845 Top 48% higher than 52% of 236 New Hampshire ZIPs
Each bar is a $20K-wide band; taller bars hold more New Hampshire 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
4,500housing units
4,500
Total Housing Units
4,345
Occupied Units
155
Vacant Units
2.17
Avg Household Size
Occupancy Type
$455,000
Median Home Value
+12% vs state ZIP avg
$1,671
Median Rent
1983
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
+7.3%
YoY Change (2024)
282
HPI Index (2000 = 100)
+182%
Total Change Since 2000
Home values in ZIP 03857 have increased 7.3% over the past year (2024). Since 2000, this ZIP has seen +182% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +4.4% | 187 |
| 2021 | +13.3% | 211 |
| 2022 | +16.0% | 245 |
| 2023 | +7.0% | 262 |
| 2024 | +7.3% | 282 |
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 152 business establishments in ZIP 03857, employing approximately 1,412 people with a combined annual payroll of $73,186,000.
152
Businesses
1,412
Employees
$73.2M
Annual Payroll
14
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 19 | 12.5% |
| Other services (except public administration) | 18 | 11.8% |
| Accommodation and food services | 17 | 11.2% |
| Construction | 16 | 10.5% |
| Health care and social assistance | 16 | 10.5% |
| Retail trade | 14 | 9.2% |
| Real estate and rental and leasing | 10 | 6.6% |
| Manufacturing | 9 | 5.9% |
| Wholesale trade | 7 | 4.6% |
| Finance and insurance | 7 | 4.6% |
| Arts, entertainment, and recreation | 6 | 4.0% |
| Administrative and support and waste management and remediation services | 5 | 3.3% |
| Information | 3 | 2.0% |
| Educational services | 3 | 2.0% |
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 03857 vs 03856 →
ZIP 03857 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
- 03801
Portsmouth (03801)
21,532 residents
- 03833
Exeter (03833)
20,955 residents
- 03824
Durham (03824)
14,638 residents
- 03857 9,006
Newmarket (03857)
9,006 residents
- 03885 7,261
Stratham (03885)
7,261 residents
- 03042 6,341
Epping (03042)
6,341 residents
- 03861 4,330
Lee (03861)
4,330 residents
- 03840 3,566
Greenland (03840)
3,566 residents
What this shows Among its immediate neighbors, ZIP 03857 ranks #5 by population - useful context the national average alone can't give.
ZIP 03857 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 03856
Newfields (03856)
$197,885 median income
- 03840
Greenland (03840)
$162,837 median income
- 03885
Stratham (03885)
$151,998 median income
- 03823
Madbury (03823)
$148,365 median income
- 03861
Lee (03861)
$131,579 median income
- 03824
Durham (03824)
$124,056 median income
- 03833
Exeter (03833)
$119,393 median income
- 03801
Portsmouth (03801)
$106,756 median income
- 03042
Epping (03042)
$104,220 median income
What this shows By household income, ZIP 03857 ranks #null of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 03856 | Newfields, NH | 1,680 | 2.2 mi |
| 03824 | Durham, NH | 14,638 | 3.7 mi |
| 03885 | Stratham, NH | 7,261 | 4.5 mi |
| 03861 | Lee, NH | 4,330 | 4.5 mi |
| 03823 | Madbury, NH | 1,719 | 7.2 mi |
| 03833 | Exeter, NH | 20,955 | 6.8 mi |
| 03840 | Greenland, NH | 3,566 | 5.7 mi |
| 03042 | Epping, NH | 6,341 | 6.3 mi |
| 03801 | Portsmouth, NH | 21,532 | 7.4 mi |
| 03820 | Dover, NH | 30,039 | 8.9 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 03857, 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 (9,006 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Rockingham County
Related Areas
Frequently Asked Questions
What county is ZIP code 03857 in?
ZIP code 03857 (Newmarket) is located in Rockingham County, New Hampshire. Rockingham County contains multiple ZIP codes, see the full list at /counties/rockingham-nh.
What is the population of ZIP code 03857?
ZIP code 03857 in Newmarket, NH has a population of 9,006 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 03857?
The median household income in ZIP 03857 is $100,845, which is 32% above the national average of $76,288.
What is the average home value in ZIP 03857?
The median home value in ZIP 03857 is $455,000, which is 64% above the national average of $278,155.
What is the demographic makeup of ZIP 03857?
The largest racial group in ZIP 03857 is White at 91.1%. Hispanic or Latino residents make up 1.4% of the population.
How many businesses are in ZIP code 03857?
ZIP code 03857 has 152 business establishments employing approximately 1,412 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 03857?
The top industries by establishment count in ZIP 03857 are: Professional, scientific, and technical services (19), Other services (except public administration) (18), Accommodation and food services (17). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 03857?
According to the FHFA House Price Index, home values in ZIP 03857 increased by 7.3% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 182%. 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 03857?
In ZIP code 03857, 66.2% of residents aged 25+ have a high school diploma or higher, and 49.7% 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 03857?
The mean commute time for workers in ZIP code 03857 is 28.2 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 03857?
In ZIP code 03857, approximately 52.9% of occupied housing units are owner-occupied and 47.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 03857?
The poverty rate in ZIP code 03857 is 4.6% 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 03857's numbers, next.
- See how ZIP 03857 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Newmarket, 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.