03031 ZIP Code — Amherst, NH

Hillsborough County, New Hampshire

ZIP code 03031 is located in Amherst, New Hampshire, within Hillsborough County. It covers approximately 33.92 square miles and serves a population of 11,814 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 603.

About ZIP code 03031

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $480,500. Owner-occupancy is high at 91%, well above the national average.

The gap between median ($152,796) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average. 34% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average. Remote work is prevalent — 26% of workers work from home.

Educational attainment is high — 64% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 03031 reflects a community defined by a highly educated population, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

11,814

population

33.92

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

03031 ZIP code map

Cities in ZIP code 03031

Below are the cities the US Postal Service accepts for ZIP code 03031. Using any city not on this list may result in mail delivery delays.

City	Status
Amherst	Preferred

Nearby ZIP codes

03057 Mont Vernon (4.4 mi) 03055 Milford (4.5 mi) 03054 Merrimack (5 mi) 03063 Nashua (8 mi) 03070 New Boston (8.2 mi) 03049 Hollis (8.2 mi) 03082 Lyndeborough (8.8 mi) 03086 Wilton (8.8 mi) 03033 Brookline (8.9 mi) 03064 Nashua (9.3 mi) 03103 Manchester (9.8 mi) 03045 Goffstown (10.7 mi)

Demographics updated 05/2026

Population
Total population	11,814
Population density	348 / sq mi
State FIPS	33
County FIPS	011

Geography
Land area	33.92 sq mi
Water area	0.51 sq mi
Latitude	42.8696
Longitude	-71.6110
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	12.1%	29.3%	31.0%
$50k – $100k	19.4%	29.8%	31.2%
$100k – $200k	44.3%	30.5%	28.1%
Over $200k	24.2%	10.5%	9.7%

Demographics & statistics

11,814

Population

348

People per sq mi

46.2

Median age

$152,796

Median household income

$73,828

Per capita income

$480,500

Median home value

$1,361

Median monthly rent

90.9%

Home ownership

4.2%

Poverty rate

2.6%

Unemployment

4,195

Housing units

63.7%

Bachelor's or higher

Age distribution

Male Female

353

Under 5

371

321

5–9

339

407

10–14

428

349

15–19

367

189

20–24

200

440

25–34

464

739

35–44

779

826

45–54

870

453

55–59

477

611

60–64

643

733

65–74

772

216

75–84

227

117

85+

123

← Male

Female →

Age summary

Group	Count	%
Under 18	2,652	22.4%
18 and over	9,162	77.6%
65 and over	2,188	18.5%
Median age	46.2 years

Race & ethnicity

White 93.2%

Two or more races 2.8%

Hispanic or Latino 2.1%

Asian 1.5%

Other race 0.3%

Group	Count	%
White	11,254	93.2%
Two or more races	336	2.8%
Hispanic or Latino	259	2.1%
Asian	178	1.5%
Other race	40	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	12.1%	29.3%	31.0%
$50k – $100k	19.4%	29.8%	31.2%
$100k – $200k	44.3%	30.5%	28.1%
Over $200k	24.2%	10.5%	9.7%

Under $10k 1.5%

$10k–$15k 0.6%

$15k–$25k 1.4%

$25k–$35k 2.7%

$35k–$50k 5.5%

$50k–$75k 10.4%

$75k–$100k 5.4%

$100k–$150k 21.3%

$150k–$200k 19.8%

$200k+ 31.4%

Range	% of households
Under $10k	1.5%
$10k–$15k	0.6%
$15k–$25k	1.4%
$25k–$35k	2.7%
$35k–$50k	5.5%
$50k–$75k	10.4%
$75k–$100k	5.4%
$100k–$150k	21.3%
$150k–$200k	19.8%
$200k+	31.4%
Median income	$152,796

Housing

Home values

$50k–$100k 0.2%

$150k–$200k 0.2%

$200k–$300k 8.9%

$300k–$500k 45.8%

$500k–$1M 42.7%

$1M+ 2.1%

Housing overview

Metric	Value
Median home value	$480,500
Median rent / month	$1,361
Owner occupied	90.9%
Renter occupied	9.1%
Vacant	1.6%
Single-family detached	88.5%
Large apartment buildings	1.6%
Mobile homes	0.2%
Median rooms	7.7
Avg household size (owned)	2.67

Year built

Era	%
2020 or later	0.0%
2010–2019	4.3%
2000–2009	9.6%
1990–1999	11.5%
1980–1989	15.7%
1970–1979	26.7%
1960–1969	15.7%
1950–1959	3.6%
1940–1949	2.5%
1939 or earlier	10.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	6.3%
2 bedrooms	16.9%
3 bedrooms	28.2%
4 bedrooms	40.5%
5+ bedrooms	8.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.0%
1 vehicle	23.2%
2 vehicles	45.1%
3 or more	29.7%

Heating fuel

Fuel type	%
Utility gas	11.0%
Electricity	5.7%
Propane / LP gas	23.2%
Fuel oil	56.8%
Wood	1.0%

Households & families

Household type	Count	%
Married-couple family	3,149	69.4%
Cohabiting couple	136	3.0%
Male householder, no spouse	343	7.6%
Female householder, no spouse	907	20.0%
Households with children under 18	1,393	30.7%
Households with seniors (65+)	1,494	32.9%
Average household size	2.61

Marital status

Status	Male	Female
Never married	19.0%	15.6%
Married	72.9%	64.5%
Separated	1.0%	1.0%
Widowed	1.3%	8.9%
Divorced	5.8%	9.9%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.6%

HS graduate 14.5%

Some college, no degree 12.3%

Associate's degree 9.0%

Bachelor's degree 35.9%

Graduate / professional 27.7%

Metric	%
HS diploma or higher	99.4%
Bachelor's or higher	63.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	158	6.1%
Kindergarten	297	11.4%
Elementary school	1,068	41.0%
High school	640	24.6%
College / grad school	442	17.0%

Employment

Industry of employment

Education & healthcare 21.0%

Professional & management 18.9%

Manufacturing 16.1%

Retail trade 11.7%

Finance & real estate 8.2%

Arts, food & hospitality 6.6%

Transportation & utilities 4.0%

Other services 3.9%

Public administration 3.3%

Construction 2.8%

Wholesale trade 2.3%

Information 0.9%

Agriculture & mining 0.3%

Occupation

Category	%
Management, business & arts	59.9%
Service	10.2%
Sales & office	21.4%
Natural resources & construction	3.5%
Production & transportation	5.1%

Employment type

Type	%
Private sector	84.7%
Government	10.3%
Self-employed	4.1%
Unpaid family workers	1.0%

Commute

Method	%
Drive alone	65.9%
Carpool	5.3%
Public transit	0.0%
Walk	0.3%
Work from home	26.4%
Other means	2.1%
Avg commute (minutes)	31.9

Poverty

All people 4.2%

Under 18 years 3.4%

18 and over 4.4%

Married-couple families 2.2%

Female-led households 4.8%

Income support

Source	% of households
Social Security	34.3%
Retirement income	29.0%
Supplemental Security	1.7%
Cash public assistance	1.1%
Food stamps / SNAP	1.2%

Health indicators

Condition	%
Obesity	28.1%
High blood pressure	28.7%
High cholesterol	30.8%
Diabetes	7.8%
Heart disease	5.0%
Stroke	2.0%
Asthma	10.5%
Arthritis	23.9%
Kidney disease	2.2%
Pulmonary disease	4.5%
Cancer	7.2%

Behavior / access	%
Smoking	10.1%
Binge drinking	17.5%
No physical activity	15.3%
Less than 7 hrs sleep	30.5%
Depression	19.7%
Fair or poor health	8.4%
Poor mental health	12.0%
Poor physical health	7.7%
No health insurance	6.6%
Visited doctor (checkup)	74.0%
Visited dentist	77.8%
Cholesterol screening	93.9%
Teeth loss	6.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	718	7.8%

Disability	%
Any disability	8.0%
Under 18	3.4%
18–64 years	7.2%
65 and over	16.3%

Health insurance coverage

Type	%
Private insurance	90.0%
Public insurance	23.3%
No insurance	2.6%
Uninsured under 19	3.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,090	93.9%
Spanish	145	1.3%
Other Indo-European	97	0.9%
Asian & Pacific Islander	21	0.2%
Other languages	18	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	11,234	95.1%
Born in same state	11,107	94.0%
Born in different state	3,779	32.0%
Foreign born	127	1.1%
Naturalized citizen	580	4.9%
Not a US citizen	409	70.5%

Ancestry

Ancestry	Count	%
French	2,797	23.7%
Italian	2,773	23.5%
German	781	6.6%
Arab	414	3.5%
English	338	2.9%

Ancestry	Count	%
Dutch	252	2.1%
Irish	93	0.8%
Norwegian	10	0.1%
Polish	8	0.1%

Technology access

Metric	% of households
Computer access	38.4%
Internet access	97.8%

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

Frequently asked questions about ZIP code 03031

What city is ZIP code 03031 in?

ZIP code 03031 is primarily assigned to Amherst, New Hampshire.

What county is ZIP code 03031 in?

ZIP code 03031 falls within Hillsborough County, New Hampshire.

How educated is the population of ZIP code 03031?

64% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 03031 mostly owner-occupied?

91% of occupied units in ZIP code 03031 are owner-occupied, well above the national average.

What is the median household income in ZIP code 03031?

The median household income in ZIP code 03031 is $152,796, above the national median of ~$75,000.

What is the typical home value in ZIP code 03031?

The median home value in ZIP code 03031 is $480,500.

What timezone is ZIP code 03031 in?

ZIP code 03031 observes the EST timezone.