With 12,487 people, Derby is a city in Connecticut. At a median age of 46.4, this is an older place than the country as a whole. Density works out to 2,470 people per square mile. Home values have more than doubled since 2000, reaching $256,700. That trails the Connecticut median by roughly 17%. People stay put here: 94% were in the same home a year ago.
At a glance
Average income
median household income $79,500, near the US median
US median: $82,259
Older
median age 46.4
US median: 38.9
Average education
36% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Derby
What changed most since 1990
Median home value (2024 dollars)$359,770 → $256,700(−29%)US over the same years: +67%
White share92.6% → 57.6%(−35.0 pts)US over the same years: −17.8 pts
Black share2.5% → 11.3%(+8.8 pts)US over the same years: +0.2 pts
Its weight in Naugatuck Valley Planning Region
Derby's population equals 2.7% of Naugatuck Valley Planning Region's. Its number of veterans equals 4.4% 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)22.3%(176)
US avg: 26.4%
Gulf War (1990s)24.8%(196)
US avg: 24.3%
Vietnam era38.4%(303)
US avg: 33.1%
Korean War2%(16)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 790 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
Derby, decade by decade
Derby 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
12,199
$85,942
$359,770
15.1%
17.5
2000
12,391
$83,195
$240,458
17.8%
32.4
2010
12,902
$74,847
$350,148
18.9%
52.6
2020
12,325
$70,945
$241,559
25.2%
70.4
2024
12,487
$79,500
$256,700
35.6%
75.1
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.
