03851 ZIP Code — Milton, NH

Strafford County, New Hampshire

ZIP code 03851 is located in Milton, New Hampshire, within Strafford County. It covers approximately 26.31 square miles and serves a population of 4,195 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 603.

About ZIP code 03851

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $246,100. Owner-occupancy is high at 86%, well above the national average.

Median household income is $86,392. The poverty rate of 6% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 30 minutes is near the national average.

College attainment at 20% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 03851 reflects a community defined by a trades-oriented workforce and high homeownership.

4,195

population

26.31

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

03851 ZIP code map

Cities in ZIP code 03851

Below are the cities the US Postal Service accepts for ZIP code 03851. Using any city not on this list may result in mail delivery delays.

City	Status
Milton	Preferred

Nearby ZIP codes

03887 Union (2.9 mi) 03852 Milton Mills (5.4 mi) 03835 Farmington (6 mi) 03855 New Durham (6.3 mi) 04027 Lebanon (6.7 mi) 03868 Rochester (7.7 mi) 04001 Acton (8 mi) 03867 Rochester (9.7 mi) 03872 Sanbornville (10 mi) 04083 Springvale (10.4 mi) 03809 Alton (10.7 mi) 04076 Shapleigh (11.7 mi)

Demographics updated 05/2026

Population
Total population	4,195
Population density	159 / sq mi
State FIPS	33
County FIPS	017

Geography
Land area	26.31 sq mi
Water area	0.61 sq mi
Latitude	43.4404
Longitude	-71.0236
Timezone	Eastern (ET)
Area code	603

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.6%	32.7%	31.0%
$50k – $100k	31.7%	33.3%	31.2%
$100k – $200k	40.8%	26.7%	28.1%
Over $200k	2.9%	7.4%	9.7%

Demographics & statistics

4,195

Population

159

People per sq mi

42.6

Median age

$86,392

Median household income

$38,111

Per capita income

$246,100

Median home value

$1,088

Median monthly rent

86.3%

Home ownership

6.0%

Poverty rate

5.4%

Unemployment

1,586

Housing units

19.6%

Bachelor's or higher

Age distribution

Male Female

Under 5

190

5–9

171

110

10–14

115

15–19

103

168

20–24

150

303

25–34

271

216

35–44

194

317

45–54

284

207

55–59

186

177

60–64

158

235

65–74

210

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	928	22.1%
18 and over	3,267	77.9%
65 and over	604	14.4%
Median age	42.6 years

Race & ethnicity

White 94.7%

Two or more races 2.2%

Hispanic or Latino 1.8%

Asian 1.1%

Other race 0.2%

Group	Count	%
White	4,046	94.7%
Two or more races	93	2.2%
Hispanic or Latino	79	1.8%
Asian	48	1.1%
Other race	8	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.6%	32.7%	31.0%
$50k – $100k	31.7%	33.3%	31.2%
$100k – $200k	40.8%	26.7%	28.1%
Over $200k	2.9%	7.4%	9.7%

Under $10k 1.9%

$10k–$15k 1.6%

$15k–$25k 6.2%

$25k–$35k 5.1%

$35k–$50k 6.0%

$50k–$75k 24.1%

$75k–$100k 8.8%

$100k–$150k 27.2%

$150k–$200k 13.7%

$200k+ 5.3%

Range	% of households
Under $10k	1.9%
$10k–$15k	1.6%
$15k–$25k	6.2%
$25k–$35k	5.1%
$35k–$50k	6.0%
$50k–$75k	24.1%
$75k–$100k	8.8%
$100k–$150k	27.2%
$150k–$200k	13.7%
$200k+	5.3%
Median income	$86,392

Housing

Home values

Under $50k 6.7%

$100k–$150k 15.8%

$150k–$200k 2.2%

$200k–$300k 40.1%

$300k–$500k 29.6%

$500k–$1M 4.8%

$1M+ 0.8%

Housing overview

Metric	Value
Median home value	$246,100
Median rent / month	$1,088
Owner occupied	86.3%
Renter occupied	13.7%
Vacant	13.6%
Single-family detached	80.3%
Large apartment buildings	0.0%
Mobile homes	8.2%
Median rooms	5.7
Avg household size (owned)	2.83

Year built

Era	%
2020 or later	0.0%
2010–2019	5.3%
2000–2009	20.6%
1990–1999	7.0%
1980–1989	19.1%
1970–1979	6.4%
1960–1969	7.6%
1950–1959	7.9%
1940–1949	2.8%
1939 or earlier	23.3%

Bedrooms

Size	% of units
No bedroom (studio)	1.2%
1 bedroom	8.3%
2 bedrooms	28.5%
3 bedrooms	49.9%
4 bedrooms	11.3%
5+ bedrooms	0.8%

Vehicles per household

Vehicles	% of households
No vehicle	3.3%
1 vehicle	17.6%
2 vehicles	41.1%
3 or more	38.0%

Heating fuel

Fuel type	%
Electricity	5.7%
Propane / LP gas	18.0%
Fuel oil	59.4%
Wood	15.0%

Households & families

Household type	Count	%
Married-couple family	866	55.8%
Cohabiting couple	232	14.9%
Male householder, no spouse	219	14.1%
Female householder, no spouse	236	15.2%
Households with children under 18	516	33.2%
Households with seniors (65+)	434	27.9%
Average household size	2.69

Marital status

Status	Male	Female
Never married	34.5%	24.3%
Married	50.3%	53.2%
Separated	0.0%	3.6%
Widowed	1.4%	3.5%
Divorced	13.9%	15.4%

Education

Less than 9th grade 2.7%

Some HS, no diploma 7.4%

HS graduate 41.7%

Some college, no degree 19.3%

Associate's degree 9.2%

Bachelor's degree 12.8%

Graduate / professional 6.9%

Metric	%
HS diploma or higher	89.8%
Bachelor's or higher	19.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	26	3.5%
Kindergarten	44	5.9%
Elementary school	366	49.5%
High school	280	37.8%
College / grad school	24	3.2%

Employment

Industry of employment

Education & healthcare 19.0%

Manufacturing 18.8%

Construction 9.8%

Retail trade 9.6%

Professional & management 8.6%

Finance & real estate 8.0%

Other services 6.8%

Arts, food & hospitality 5.7%

Public administration 4.9%

Transportation & utilities 3.4%

Wholesale trade 2.3%

Information 1.7%

Agriculture & mining 1.2%

Occupation

Category	%
Management, business & arts	36.8%
Service	11.2%
Sales & office	19.7%
Natural resources & construction	16.7%
Production & transportation	15.6%

Employment type

Type	%
Private sector	78.6%
Government	13.0%
Self-employed	8.4%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	75.4%
Carpool	9.5%
Public transit	0.6%
Walk	0.4%
Work from home	14.1%
Other means	0.0%
Avg commute (minutes)	30.0

Poverty

All people 6.0%

Under 18 years 1.6%

18 and over 7.1%

Married-couple families 3.2%

Female-led households 0.0%

Income support

Source	% of households
Social Security	27.3%
Retirement income	22.0%
Supplemental Security	4.2%
Cash public assistance	1.5%
Food stamps / SNAP	3.9%

Health indicators

Condition	%
Obesity	30.8%
High blood pressure	30.0%
High cholesterol	32.1%
Diabetes	8.6%
Heart disease	5.5%
Stroke	2.5%
Asthma	10.6%
Arthritis	23.6%
Kidney disease	2.4%
Pulmonary disease	6.3%
Cancer	6.3%

Behavior / access	%
Smoking	18.0%
Binge drinking	18.8%
No physical activity	20.6%
Less than 7 hrs sleep	31.2%
Depression	25.9%
Fair or poor health	12.3%
Poor mental health	16.2%
Poor physical health	10.3%
No health insurance	10.8%
Visited doctor (checkup)	71.6%
Visited dentist	66.9%
Cholesterol screening	90.4%
Teeth loss	12.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	261	8.0%

Disability	%
Any disability	12.8%
Under 18	7.4%
18–64 years	11.3%
65 and over	27.5%

Health insurance coverage

Type	%
Private insurance	72.6%
Public insurance	31.3%
No insurance	6.8%
Uninsured under 19	4.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	4,023	95.9%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	4,115	98.1%
Born in same state	4,038	96.3%
Born in different state	2,520	60.1%
Foreign born	77	1.8%
Naturalized citizen	80	1.9%
Not a US citizen	46	57.5%

Ancestry

Ancestry	Count	%
Italian	816	19.5%
French	601	14.3%
German	276	6.6%
Arab	130	3.1%

Ancestry	Count	%
Irish	37	0.9%
Polish	37	0.9%
Dutch	15	0.4%

Technology access

Metric	% of households
Computer access	37.0%
Internet access	96.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 03851

What city is ZIP code 03851 in?

ZIP code 03851 is primarily assigned to Milton, New Hampshire.

What county is ZIP code 03851 in?

ZIP code 03851 falls within Strafford County, New Hampshire.

Is ZIP code 03851 mostly owner-occupied?

86% of occupied units in ZIP code 03851 are owner-occupied, well above the national average.

What is the population of ZIP code 03851?

ZIP code 03851 has an estimated population of 4,195 residents, with a density of 159 people per square mile.

What is the median household income in ZIP code 03851?

The median household income in ZIP code 03851 is $86,392, above the national median of ~$75,000.

What is the typical home value in ZIP code 03851?

The median home value in ZIP code 03851 is $246,100.

What timezone is ZIP code 03851 in?

ZIP code 03851 observes the EST timezone.