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New Hampshire ZIP Codes
Carroll County
North Sandwich, NH
03259
03259 ZIP Code — North Sandwich, NH
Carroll County, New Hampshire
ZIP code 03259 is located in
North Sandwich ,
New Hampshire ,
within Carroll County .
It covers approximately 33.27 square miles and serves a population of
246 residents.
This is a standard ZIP code in the Eastern (ET) timezone,
served by area code 603 .
About ZIP code 03259
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 $365,700.
Median household income is $79,375. 66% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with construction as the leading industry. An above-average commute of 42 minutes suggests many residents work outside the immediate area.
Educational attainment is high — 56% of residents hold a bachelor's degree or higher, well above the national average of 33%.
Overall, ZIP code 03259 reflects a community defined by a highly educated population, high homeownership, and a significant Social Security-dependent population.
03259 ZIP code map
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Cities in ZIP code 03259
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Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
246
Population density
7 / sq mi
State FIPS
33
County FIPS
003
Geography
Land area
33.27 sq mi
Water area
0.14 sq mi
Latitude
43.8662
Longitude
-71.4011
Timezone
Eastern (ET)
Area code
603
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
20.2%
37.9%
31.0%
$50k – $100k
51.5%
32.8%
31.2%
$100k – $200k
21.0%
22.6%
28.1%
Over $200k
7.3%
6.7%
9.7%
Demographics & statistics
$79,375
Median household income
$365,700
Median home value
55.6%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 12 4.9% 18 and over 234 95.1% 65 and over 117 47.6% Median age 63.3 years
Race & ethnicity
Group Count % White 243 98.8% Two or more races 3 1.2%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
20.2%
37.9%
31.0%
$50k – $100k
51.5%
32.8%
31.2%
$100k – $200k
21.0%
22.6%
28.1%
Over $200k
7.3%
6.7%
9.7%
Range % of households $15k–$25k 9.4% $35k–$50k 15.4% $50k–$75k 4.0% $75k–$100k 40.3% $100k–$150k 16.1% $150k–$200k 2.0% $200k+ 12.8% Median income $79,375
Housing
Housing overview
Metric Value Median home value $365,700 Median rent / month $0 Owner occupied 100.0% Renter occupied 0.0% Vacant 43.1% Single-family detached 96.6% Large apartment buildings 0.0% Mobile homes 3.4% Median rooms 5.9 Avg household size (owned) 1.65
Year built
Era % 2020 or later 0.0% 2010–2019 1.5% 2000–2009 16.0% 1990–1999 4.2% 1980–1989 9.9% 1970–1979 30.9% 1960–1969 3.8% 1950–1959 3.4% 1940–1949 3.1% 1939 or earlier 27.1%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 5.0% 2 bedrooms 45.0% 3 bedrooms 34.0% 4 bedrooms 16.0% 5+ bedrooms 0.0%
Vehicles per household
Vehicles % of households No vehicle 2.0% 1 vehicle 19.5% 2 vehicles 67.8% 3 or more 10.7%
Heating fuel
Fuel type % Propane / LP gas 17.4% Fuel oil 20.1% Wood 62.4%
Households & families
Household type Count % Married-couple family 49 32.9% Cohabiting couple 13 8.7% Male householder, no spouse 63 42.3% Female householder, no spouse 24 16.1% Households with children under 18 6 4.0% Households with seniors (65+) 110 73.8% Average household size 1.65
Marital status
Status Male Female Never married 7.2% 28.4% Married 42.4% 53.7% Separated 0.0% 0.0% Widowed 0.0% 9.5% Divorced 50.4% 8.4%
Education
Some college, no degree
5.6%
Graduate / professional
12.4%
Metric % HS diploma or higher 94.9% Bachelor's or higher 55.6%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 0 0.0% Kindergarten 0 0.0% Elementary school 12 100.0% High school 0 0.0% College / grad school 0 0.0%
Employment
Industry of employment
Education & healthcare
23.3%
Transportation & utilities
5.4%
Finance & real estate
4.7%
Public administration
4.7%
Professional & management
3.1%
Arts, food & hospitality
1.6%
Occupation
Category % Management, business & arts 31.0% Service 12.4% Sales & office 24.0% Natural resources & construction 29.5% Production & transportation 3.1%
Employment type
Type % Private sector 65.1% Government 6.2% Self-employed 28.7% Unpaid family workers 0.0%
Commute
Method % Drive alone 81.4% Carpool 0.0% Public transit 0.0% Walk 3.9% Work from home 14.7% Other means 0.0% Avg commute (minutes) 41.9
Poverty
Married-couple families
0.0%
Female-led households
0.0%
Income support
Source % of households Social Security 65.8% Retirement income 44.3% Supplemental Security 2.0% Cash public assistance 0.0% Food stamps / SNAP 0.0%
Health indicators
Condition % Obesity 29.9% High blood pressure 35.8% High cholesterol 37.7% Diabetes 11.2% Heart disease 8.1% Stroke 3.5% Asthma 10.7% Arthritis 31.4% Kidney disease 3.2% Pulmonary disease 8.2% Cancer 8.6%
Behavior / access % Smoking 15.7% Binge drinking 14.1% No physical activity 22.3% Less than 7 hrs sleep 30.6% Depression 21.1% Fair or poor health 14.4% Poor mental health 13.6% Poor physical health 12.0% No health insurance 10.1% Visited doctor (checkup) 72.0% Visited dentist 65.0% Cholesterol screening 93.8% Teeth loss 11.0%
Veterans & disability
Veterans Count % Civilian veterans 11 4.7%
Disability % Any disability 14.2% Under 18 0.0% 18–64 years 11.1% 65 and over 18.8%
Health insurance coverage
Type % Private insurance 57.3% Public insurance 53.3% No insurance 6.5% Uninsured under 19 0.0%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 246 100.0% 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) 239 97.2% Born in same state 239 97.2% Born in different state 129 52.4% Foreign born 0 0.0% Naturalized citizen 7 2.8% Not a US citizen 3 42.9%
Ancestry
Ancestry Count % Italian 100 40.7% French 75 30.5%
Ancestry Count % English 5 2%
Technology access
Metric % of households Computer access 60.6% Internet access 92.6%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 03259
What city is ZIP code 03259 in?
ZIP code 03259 is primarily assigned to North Sandwich, New Hampshire.
What county is ZIP code 03259 in?
ZIP code 03259 falls within Carroll County, New Hampshire.
Does ZIP code 03259 have an older population?
48% of residents in ZIP code 03259 are 65 or older, above the national average of ~17%.
Does ZIP code 03259 have a large retiree population?
66% of households in ZIP code 03259 receive Social Security income, suggesting a significant retiree or disability population.
How educated is the population of ZIP code 03259?
56% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.
What is the typical home value in ZIP code 03259?
The median home value in ZIP code 03259 is $365,700.
What timezone is ZIP code 03259 in?
ZIP code 03259 observes the EST timezone.
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