COUNTY · 2010 ACS
New Castle County
Delaware · 538,479 residents · 426 sq mi
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The short version
New Castle County is home to 538,479 people in Delaware. About 32% of adults have finished a four-year degree. Median household income runs $62,474, well clear of the $52,703 US median. The poverty rate is 10.3%, under the national 13.8%. The population has held roughly steady since 2000. The typical home is worth $252,800, having more than doubled since 2000.
At a glance
Wealthier
above the US median
US median: $52,703
Mid-age
median age 37.2
US median: 37.2
More educated
32% hold a bachelor's degree
US average: 28%
Less affordable
home values up 50%, inflation adjusted
US median home: $225,659
Section 01
Population & growth
Land area
426 sq mi
Population, 1990 – 2024
2024578K
Age distribution, 2010
Under 56.2%(33,249)
5 to 96.3%(34,123)
10 to 146.5%(35,040)
15 to 197.6%(40,966)
20 to 247.5%(40,457)
25 to 3413.1%(70,744)
35 to 4413.6%(73,298)
45 to 5415.2%(81,987)
55 to 6411.6%(62,393)
65 to 746.6%(35,495)
75 to 844%(21,531)
85 and over1.7%(9,196)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$62,474
−6%inflation adjusted, since 2000
from $52,419 in 2000
US average: $52,703
1990 – 2024
Households earning $100K+
41.6%
−0.3 ptssince 2009
from 41.9% in 2009
US average: 33.3%
Workforce by industry, 2010
Other services13.1%
Public administration11.4%
Information11.2%
Retail trade9.7%
Wholesale trade6.1%
Finance & insurance5%
Professional, scientific, technical4.1%
Transportation & warehousing2.4%
Arts, entertainment, food2%
Education & health services0.9%
Agriculture, forestry, fishing0.4%
Construction0.3%
Manufacturing0.1%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$252,800
+50%inflation adjusted, since 2000
from $132,900 in 2000
US average: $225,659
1990 – 2024
4.0
+4%since 2009
from 3.9 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Section 04
Race & ethnicity
2000
White, non-Hispanic70.7%(353,760)
Black19.9%(99,648)
Hispanic / Latino5.3%(26,293)
Asian2.6%(12,856)
Other0%
2010
White, non-Hispanic61.6%(331,836)
Black23.1%(124,426)
Hispanic / Latino8.7%(46,921)
Asian4.3%(23,132)
Other1.8%(9,820)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry
Hispanic origin
Mexican3.7%(19,848)
Puerto Rican2.8%(14,965)
South American0.7%(3,562)
Peruvian0.2%(1,207)
Central American0.2%(1,150)
Cuban0.2%(1,135)
Dominican0.2%(1,128)
Colombian0.1%(710)
Argentine0.1%(447)
Ecuadorian0.1%(426)
Guatemalan0.1%(332)
Honduran0.1%(298)
+ 9 more hispanic origin groups with data
Spaniard0.1%(292)
Chilean0%(221)
Panamanian0%(187)
Venezuelan0%(185)
Salvadoran0%(168)
Costa Rican0%(133)
Paraguayan0%(115)
Nicaraguan0%(32)
Bolivian0%(25)
Ancestry
Irish19.2%(102,172)
German15%(79,830)
Italian11.7%(62,330)
English11.3%(60,130)
Polish6.2%(33,108)
American3%(16,262)
Scottish2%(10,550)
French1.9%(10,354)
Scotch-Irish1.7%(9,291)
Subsaharan African1.5%(7,905)
Dutch1.3%(7,157)
Welsh1.1%(5,698)
+ 50 more ancestry groups with data
Russian1%(5,311)
West Indian1%(5,130)
Ukrainian0.9%(4,695)
Swedish0.8%(4,328)
Greek0.6%(3,391)
Jamaican0.6%(2,981)
Hungarian0.5%(2,874)
British0.5%(2,672)
Norwegian0.5%(2,668)
Arab0.4%(2,218)
Lithuanian0.4%(1,924)
French Canadian0.3%(1,527)
Czech0.3%(1,434)
Swiss0.2%(1,282)
Austrian0.2%(1,263)
Canadian0.2%(1,178)
Portuguese0.2%(1,097)
Danish0.2%(1,086)
Slovak0.2%(1,074)
Haitian0.2%(849)
Romanian0.2%(827)
Kenyan0.1%(725)
Nigerian0.1%(700)
Turkish0.1%(543)
Ghanaian0.1%(528)
Iranian0.1%(485)
Lebanese0.1%(445)
Guyanese0.1%(408)
Trinidadian & Tobagonian0.1%(402)
Armenian0.1%(338)
Belgian0%(241)
Croatian0%(211)
Finnish0%(211)
Bulgarian0%(196)
Ethiopian0%(189)
Brazilian0%(171)
Moroccan0%(160)
Latvian0%(129)
Egyptian0%(125)
Palestinian0%(114)
Israeli0%(113)
Slovene0%(110)
Barbadian0%(93)
Syrian0%(85)
Serbian0%(77)
Jordanian0%(56)
Cape Verdean0%(47)
Australian0%(22)
Macedonian0%(13)
Iraqi0%(1)
Section 05
Education
High school or higher
88.4%
+2.9 ptssince 2000
from 85.5% in 2000
US average: 84.9%
Section 06
Commute & transportation
Section 07
Work & employment
Section 08
People & community
Marital status (2024)
Men 15+
Never married39.4%(90,389)
Married49%(112,456)
Widowed2.9%(6,720)
Divorced8.7%(19,853)
Women 15+
Never married36%(89,278)
Married43.9%(108,966)
Widowed8%(19,751)
Divorced12.1%(29,978)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage
Showing 2024 (the nearest year with coverage data).
Direct-purchase
13.6%
+0.5 ptssince 2020
from 13.1% in 2020
US average: 13.8%
VA health care
1.7%
−0.1 ptssince 2020
from 1.8% in 2020
US average: 2.2%
Any private
73.2%
−2.2 ptssince 2020
from 75.4% in 2020
US average: 67.1%
Any public
34.8%
+1.1 ptssince 2020
from 33.7% in 2020
US average: 36.7%
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)22.4%(5,898)
Gulf War (1990s)19.4%(5,106)
Vietnam era34%(8,941)
Korean War4%(1,042)
World War II1.3%(352)
Share of the 26,290 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
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Frequently asked
How many people live in New Castle County, Delaware?
New Castle County, Delaware has about 538,479 residents according to the 2010 American Community Survey.
What is the median household income in New Castle County, Delaware?
The typical household in New Castle County, Delaware earns about $62,474 a year. Half of households make more than that, and half make less.
Is New Castle County, Delaware expensive?
In New Castle County, Delaware, the median home is worth about $252,800, and the typical rent is about $953 a month.
How educated are people in New Castle County, Delaware?
About 32.4% of adults age 25 and over in New Castle County, Delaware hold a bachelor's degree or higher.
What is the poverty rate in New Castle County, Delaware?
About 10.3% of people in New Castle County, Delaware live below the federal poverty line.
Has New Castle County, Delaware grown since 1990?
Yes, New Castle County, Delaware has grown since 1990. The population has added about 96,533 residents, a change of about 22 percent over that period.
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145 census tracts (top 20 by population)
Census Tract 166.11Census Tract 148.09Census Tract 145.02Census Tract 166.08Census Tract 166.10Census Tract 149.03Census Tract 166.12Census Tract 163.01Census Tract 168.08Census Tract 135.01Census Tract 148.10Census Tract 166.14Census Tract 164.01Census Tract 148.11Census Tract 149.09Census Tract 148.08Census Tract 135.08Census Tract 138Census Tract 136.11Census Tract 15229 ZIP codes
ZIP 19720ZIP 19702ZIP 19709ZIP 19711ZIP 19701ZIP 19805ZIP 19808ZIP 19713ZIP 19810ZIP 19802ZIP 19803ZIP 19804ZIP 19707ZIP 19801ZIP 19703ZIP 19809ZIP 19734ZIP 19806ZIP 19807ZIP 19717ZIP 19706ZIP 19731ZIP 19730ZIP 19733ZIP 19736ZIP 19732ZIP 19716ZIP 19735ZIP 19710Up the hierarchy
All counties in DelawareDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024