Londonderry, NH

Town in NH, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

26,685

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

42.7

years ∙ half population younger than 42.7, half older

Diversity Index

16%

chance two random people differ in race and ethnicity

Nativity

4.2%

foreign-born population

95.8%Native

4.2% Foreign-born

Geographic Context

Location, size, and surroundings

About

Londonderry is a town in Rockingham County, New Hampshire, United States.

Location

Town in NH, US

Co-ordinates

DEC42.879789° N, 71.392326° W

DMS42° 52′ 47.24″ N, 71° 23′ 32.37″ W

Population Density & area

635.4/sq mi (245.3/km²)

Total Area

42.1 sq mi (109.1 km²)

Land Area

42 sq mi (108.8 km²) · 99.7%

Water Area

0.1 sq mi (0.3 km²) · 0.3%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

51.4% male

Male 51.4%

Female 48.6%

males per 100 females

Londonderry 105.8

New Hampshire 99.7

United States 98

Nativity

4.2%

foreign-born population

95.8%Native

4.2% Foreign-born

% Foreign-born

Londonderry 4.2%

New Hampshire 6.1%

United States 14.1%

Age Distribution

How the population is spread across age groups

Median Age

42.7

years ∙ half population younger than 42.7, half older

Londonderry

42.7

New Hampshire

43.3

United States

38.9

Dependency ratio

58.7

dependents per 100 working-age adults

Londonderry 58.7

New Hampshire 62.3

United States 64.4

AGE DISTRIBUTION

Distribution of age group

Median age

	Londonderry	New Hampshire	United States
Age Group
Children (Under 18)	20.6%	18.2%	22%
Working age (18-64)	63%	61.7%	60.8%
Senior (65+)	16.4%	20.1%	17.2%
Dependency ratio
Total dependency ratio	58.7	62.3	64.4
Child dependency ratio	32.7	29.6	36.1
Old-age dependency ratio	26	32.7	28.3

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

91.5%

Black

0.3%

Asian

1.4%

Hispanic

4.6%

Other

2.2%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

16%

chance two random people differ in race and ethnicity

Londonderry 16%

New Hampshire 24%

United States 61.4%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Londonderry population

	Londonderry	New Hampshire	United States
Hispanic or Latino	4.6%	4.7%	19.3%
Mexican	0.8%	0.8%	11.3%
Puerto Rican	1.3%	1.4%	1.8%
Cuban	0.1%	0.1%	0.8%
Other Hispanic / Latino	2.5%	2.3%	5.5%
Not Hispanic or Latino	95.4%	95.3%	80.7%
One race	93.7%	91.3%	76.4%
White	91.5%	86.9%	57.4%
Black or African American	0.3%	1.3%	11.9%
American Indian and Alaska Native	0%	0.1%	0.5%
Asian	1.4%	2.6%	5.9%
Native Hawaiian and Other Pacific Islander	0%	0%	0.2%
Some Other Race	0.4%	0.4%	0.6%
Two or more races (Multiracial)	1.7%	4%	4.3%

Household & Families Composition

Household size, type, and family structure

Household structure

74.5% family

Family 74.5%

Non family 25.5%

% family households

Londonderry 74.5%

New Hampshire 64.5%

United States 64.2%

Average household size

2.7

persons per household

Londonderry

2.7

New Hampshire

2.44

United States

2.53

Household & Family COMPOSITION

Households

Percentage of Londonderry population

	Londonderry	New Hampshire	United States
Total households	9,879	555,822	129,227,496
Average houshold size	2.7	2.44	2.53
Family households	7,355	358,314	82,990,528
Average family size	3.13	2.97	3.14
Married couple family	5,966	286,197	60,637,388
Other families	1,389	72,117	22,353,140
Male householder	396	24,853	6,572,819
Female householder	993	47,264	15,780,321
Non-family households	2,524	197,508	46,236,968
One-person households	1,958	152,350	37,140,836
Male householder	889	68,271	16,871,444
Senior (65+) living alone	372	25,581	5,225,110
Female householder	1,069	84,079	20,269,392
Senior (65+) living alone	890	46,808	10,089,070
Other living arrangements	566	45,158	9,096,132

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

10,197

housing units

Londonderry 10,197

New Hampshire 648,472

United States 143,775,355

Occupancy status

96.9% occupied

Occupied 96.9%

Vacant 3.1%

vacancy rate

Londonderry 3.1%

New Hampshire 14.3%

United States 10.1%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

80.3%

Single family houses

80.3%

Apartments in multi-unit structures

16.9%

Mobile homes

2.7%

Boat, RV, van, etc

Median Year Built

1986

Half of houses were built before 1986, and half after.

Historic ∙ 1939 or earlier

2.8%

Postwar & mid-century ∙ 1940 - 1969

10.4%

Late 20th century ∙ 1970 - 1999

60.2%

Modern ∙ 2000 or later

26.8%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Londonderry	New Hampshire	United States
Rooms per unit
Median rooms	6.6	5.6	5.5
1–3 rooms	7.2%	13.4%	15.1%
4–6 rooms	41.2%	51.4%	51.6%
7+ rooms	51.7%	35.2%	33.4%
Bedrooms
No bedroom / studio	0.6%	1.7%	2.9%
1 bedroom	4%	11.2%	10.9%
2 bedrooms	30.8%	29.9%	25%
3 bedrooms	34%	37.7%	38.7%
4+ bedrooms	30.6%	19.5%	22.4%
At a glance
Median year built	1986	1980	1981
Total housing units	10,197	648,472	143,775,355

Occupancy Profile

Who is inside and how they use it

Homeownership

85.6% owners

Renter-occupied 14.4%

Owner-occupied 85.6%

homeownership rate

Londonderry 85.6%

New Hampshire 72.8%

United States 65.2%

Average household size

2.79

Owner-occupied

2.15

Renter-occupied

owner-occupied average size

Londonderry 2.79

New Hampshire 2.58

United States 2.64

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Londonderry	New Hampshire	United States
Total occupied units	9,879	555,822	129,227,496
Year moved in
2020 or later	19.1%	21.2%	24.8%
2010 to 2019	38.1%	39.6%	39.6%
2000 to 2009	18.9%	17.5%	16.4%
1999 or earlier	24%	21.7%	19.1%
Occupants per room
1.00 or fewer	99.5%	98.6%	96.6%
1.01 to 1.50	0.3%	0.9%	2.2%
1.51 or more	0.2%	0.5%	1.2%
Vehicles availability
No vehicles	1.6%	4.6%	8.4%
1 vehicle	26.2%	31.2%	33.1%
2 vehicles	40.9%	40.8%	36.6%
3 or more vehicles	31.3%	23.4%	21.9%
House heating fuel used
Gas	40.5%	40.6%	51.4%
Electricity	10.4%	11.1%	41.3%
Solar	0.3%	0.3%	0.3%
Fuel oil, kerosene etc	44.7%	39.5%	3.9%
All other fuels	3.6%	7.7%	2%
No fuel used	0.5%	0.8%	1.2%
Selected characteristics
Lacking complete plumbing	0.3%	0.5%	0.4%
Lacking complete kitchen	0.9%	0.7%	0.8%
No telephone service available	0.8%	0.6%	0.9%

Housing Value

What owner-occupied units are worth

Median home value

$505,200

owner-occupied units

Median value(USD)

Londonderry

$505,200

New Hampshire

$402,500

United States

$332,700

Housing Cost Burden

27.5%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

27.5%

Owners without a mortgage

26.7%

Renters

48.9%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Londonderry	New Hampshire	United States
Property value
Median Value	$505,200	$402,500	$332,700
Under $100,000	2%	5.8%	11.4%
$100,000 - $200,000	2.6%	7.6%	15.8%
$200,000 - $300,000	13.2%	16.1%	17.8%
$300,000 - $500,000	31.4%	38.7%	26.9%
$500,000 - $1,000,000	48.5%	27.6%	20.9%
$1,000,000 and more	2.3%	4.1%	7.1%
Owner-occupied households
With a mortgage	67.9%	62.2%	60.6%
Without a mortgage	32.1%	37.8%	39.4%
Median monthly owner costs
With a mortgage	$2,653	$2,367	$1,963
Without a mortgage	$1,128	$995	$638
Gross rent
Median rent	$1,803	$1,491	$1,413

Education Profile

How educated is the community and how education pays off

Adults with a college degree

47.6%

of adults 25+ with a bachelor's degree or higher

Londonderry 47.6%

New Hampshire 40.6%

United States 35.7%

Adults without a high school diploma

2.8%

of adults (25+) without a high school diploma

Londonderry 2.8%

New Hampshire 5.6%

United States 10.4%

School Enrollment

Who is enrolled in school and at what level

School enrollment

6,021

population (age 3+) enrolled in school

Nursery / Preschool

6.8%

K–12

72.2%

College / Undergraduate

16.9%

Graduate / Professional

4.2%

College-going rate (18-24 yr olds)

35.5%

of 18-24-year-olds in college or graduate school

Londonderry

35.5%

New Hampshire

42.6%

United States

40.9%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Londonderry	New Hampshire	United States
Total enrolled (age 3+)	6,021	291,492	80,089,790
Nursery / preschool	6.8%	5.9%	5.7%
K–12	72.2%	65.5%	67.6%
Kindergarten	2.2%	4.5%	5%
Elementary: Grades 1–4	19.5%	18.4%	19.8%
Elementary: Grades 5–8	23.9%	20.3%	21%
High School: Grades 9–12	26.6%	22.3%	21.7%
College or graduate school	21.1%	28.6%	26.7%
College, undergraduate	16.9%	22.4%	21%
Graduate, professional school	4.2%	6.2%	5.8%
College-going rate · 18-24 yr olds	35.5%	42.6%	40.9%
School type
Public school	79.8%	77%	82%
Private school	20.2%	23%	18%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

18,720

population 25 years and over

Total adults (25+)

Less than 9th grade

1.7%

9th-12th, no diploma

1.1%

HS graduate

21.4%

Some college no degree

17.3%

Associates degree

10.9%

Bachelors degree

30.3%

Graduate or professional degree

17.4%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

37.3% · 62.7%

9th-12th, no diploma

35.2% · 64.8%

HS graduate

58.3% · 41.7%

Some college no degree

46.3% · 53.7%

Associates degree

37.6% · 62.4%

Bachelors degree

52.9% · 47.1%

Graduate or professional degree

48.3% · 51.7%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Londonderry	New Hampshire	United States
Population (25+)	18,720	1,019,229	230,807,303
Less than 9th grade	1.7%	1.8%	4.7%
9th–12th, no diploma	1.1%	3.8%	5.7%
High school diploma or GED	21.4%	26.8%	26%
Some college, no degree	17.3%	17.2%	19.1%
Associate's degree	10.9%	9.8%	8.8%
Bachelor's degree or higher	47.6%	40.6%	35.7%
Bachelor's degree	30.3%	24.5%	21.6%
Graduate or professional	17.4%	16.1%	14.1%
High School or higher	97.2%	94.4%	89.6%

Earnings by education level

percentage as applicable

Median Earnings

$71,120

Median earnings for adults 25+, by level

Less than HS graduate

$54,688

HS graduate

$55,656

Some college or associates

$53,779

Bachelors degree

$93,513

Graduate or professional degree

$92,917

Poverty Rate

for ages 25+, with bachelors degree or higher

Less than HS graduate

21.6%

HS graduate

4.9%

Some college or associates

3.6%

Bachelors degree or higher

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Londonderry	New Hampshire	United States
Median earnings
Population 25+, with earnings	$71,120	$60,332	$52,696
Less than high school graduate	$54,688	$40,457	$32,485
High school graduate (includes equivalency)	$55,656	$48,323	$40,153
Some college or associate's degree	$53,779	$52,211	$47,260
Bachelor's degree	$93,513	$72,069	$70,044
Graduate or professional degree	$92,917	$88,483	$90,720
Poverty rates
Less than high school graduate	21.6%	20.6%	24.2%
High school graduate (includes equivalency)	4.9%	9.6%	14.4%
Some college or associate's degree	3.6%	6.5%	9.8%
Bachelor's degree or higher	1%	3.1%	4.5%

Insights for Londonderry, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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