PlainZIP

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
$100,845
Median income
$455,000
Median home value
49.7%
Bachelor's or higher

The verdict

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.

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 New Hampshire average), while per-capita income is $58,507. The poverty rate stands at 4.6% and the unemployment rate at 1.0%. On housing, the median home value is $455,000 (12% above the state average) with median rent at $1,671 per month, and 52.9% of occupied units 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. Beyond these figures, 10 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Rockingham County, letting you compare 03857 to its immediate surroundings rather than a national baseline alone.

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.

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 · ZIP Code Business Patterns (ZBP) As of 2023

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

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 03857?

41.2

Median Age

49.4%

Male

50.6%

Female

5.0%

Foreign-Born

White 91.1%
African American 0.6%
Asian 1.3%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 6.2%
Hispanic or Latino 1.4%

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

$58,507

Per Capita Income

4.6%

Poverty Rate

1.0%

Unemployment Rate

28.2 min

Mean Commute Time

How ZIP 03857 ranks nationally

Newmarket, NH household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$100,845 Top 19% higher than 81% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

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?

High School Graduate or Higher 66.2%
Bachelor's Degree or Higher 49.7%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

4,500

Total Housing Units

4,345

Occupied Units

155

Vacant Units

2.17

Avg Household Size

Occupancy Type

Owner 52.9%
Renter 47.1%

$455,000

Median Home Value

+12% vs state

$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.

residents

What this shows Among its immediate neighbors, ZIP 03857 ranks #5 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 03857 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

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.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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

More ZIP Codes in Rockingham County

03038 standard
Derry, NH
Pop: 33,269
03079 standard
Salem, NH
Pop: 28,776
03053 standard
Londonderry, NH
Pop: 23,957
03801 standard
Portsmouth, NH
Pop: 21,532
03833 standard
Exeter, NH
Pop: 20,955
03842 standard
Hampton, NH
Pop: 15,345

Related Areas

Rockingham County Newmarket, NH New Hampshire

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.

Read our methodology to see how this data is sourced, computed, and verified.