Derry is home to 21,339 people in New Hampshire. That puts it in the top 10% of US cities for household income. Poverty is uncommon here, at 4.4% of locals. 6% of locals were born outside the United States. There are 1,332 people per square mile. Owners hold 59% of the housing stock.
At a glance
Wealthier
median household income $91,673, above the US median
US median: $82,259
Older
median age 41.0
US median: 38.9
Average education
37% hold a bachelor's degree
US average: 36%
Less affordable
home values up 77%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Derry
What changed most since 1990
White share96.6% → 89.4%(−7.2 pts)US over the same years: −17.8 pts
Median home value (2024 dollars)$321,609 → $391,200(+22%)US over the same years: +67%
Median age29.6 → 41.0(+11.4 years)US over the same years: +6.0 years
Derry's population equals 6.7% of Rockingham County's. Its number of residents 65 and older equals 4.9% of the county's. Its number of households without a car equals 9.5% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)44.5%(616)
US avg: 26.4%
Gulf War (1990s)30.4%(421)
US avg: 24.3%
Vietnam era29.3%(406)
US avg: 33.1%
Korean War0.4%(6)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 1,385 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Derry, decade by decade
Derry population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
20,446
$98,163
$321,609
23.8%
8.3
2000
22,661
$90,704
$221,331
24.5%
13.6
2010
22,015
$91,387
$324,542
28.4%
19.1
2020
22,879
$84,616
$298,404
29.7%
28.7
2024
21,339
$91,673
$391,200
36.7%
24.6
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
