COUNTY
New Castle County
Delaware · 588,026 residents (2025 est.) · 426.337 sq mi
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The short version
New Castle County is wealthier than most US places, with a median household income of $91,166. Population has grown 16% since 2000. Median home value has more than doubled since 2000, reaching $352,200. It ranks in the top 5% of US counties for household income.
At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 39.3
US median: 38.9
More educated
40% hold a bachelor's degree
US average: 36%
Less affordable
home values up 45%, inflation adjusted
US median home: $376,019
Section 01
Population & growth
PEP 2025 EST:588,026 residents (Census Bureau Vintage 2025, released March 2026)
Population, 1990 – 2024
2024578K
Age distribution, 2024
Under 55.5%(31,543)
5 to 95.6%(32,342)
10 to 146.3%(36,685)
15 to 196.7%(38,938)
20 to 246.2%(35,574)
25 to 3413.8%(80,036)
35 to 4413.3%(76,725)
45 to 5412.2%(70,374)
55 to 6413.4%(77,186)
65 to 7410.2%(58,805)
75 to 845%(28,703)
85 and over1.9%(11,050)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$91,166
−5%inflation adjusted, since 2000
from $52,419 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
58.6%
+16.7 ptssince 2009
from 41.9% in 2009
US average: 53.3%
Workforce by industry, 2024
Other services11.6%
Information10.8%
Public administration10.3%
Retail trade7.1%
Finance & insurance6.6%
Professional, scientific, technical5.9%
Wholesale trade5.9%
Transportation & warehousing1.7%
Arts, entertainment, food1.1%
Education & health services0.7%
Agriculture, forestry, fishing0.5%
Construction0.5%
Manufacturing0%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$352,200
+45%inflation adjusted, since 2000
from $132,900 in 2000
US average: $376,019
1990 – 2024
3.9
−1%since 2009
from 3.9 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
37
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in New Castle County on RentDataNow
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%
2024
White, non-Hispanic52.3%(302,505)
Black24.9%(143,725)
Hispanic / Latino11.8%(68,181)
Asian6.2%(35,717)
Other4.8%(27,833)
81
+24%since 2009
from 65 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
35
−6%since 2020
from 37 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry
Hispanic origin
Mexican4.4%(25,453)
Puerto Rican3.7%(21,312)
South American1%(5,801)
Dominican1%(5,713)
Central American0.6%(3,600)
Colombian0.3%(1,826)
Guatemalan0.3%(1,568)
Spaniard0.2%(1,378)
Cuban0.2%(1,313)
Venezuelan0.2%(905)
Peruvian0.1%(841)
Chilean0.1%(805)
+ 10 more hispanic origin groups with data
Honduran0.1%(728)
Salvadoran0.1%(654)
Argentine0.1%(619)
Ecuadorian0.1%(539)
Panamanian0.1%(426)
Costa Rican0%(197)
Paraguayan0%(99)
Bolivian0%(82)
Uruguayan0%(79)
Nicaraguan0%(27)
Asian origin
Asian Indian2.7%(15,782)
Chinese1.3%(7,337)
Filipino0.6%(3,391)
Pakistani0.3%(1,757)
Korean0.3%(1,707)
Bangladeshi0.2%(1,385)
Vietnamese0.2%(1,295)
Japanese0.1%(552)
Taiwanese0.1%(525)
Nepalese0.1%(329)
Cambodian0%(144)
Kazakh0%(111)
+ 8 more asian origin groups with data
Sri Lankan0%(103)
Indonesian0%(89)
Thai0%(77)
Uzbek0%(62)
Mongolian0%(55)
Malaysian0%(47)
Laotian0%(37)
Burmese0%(7)
Pacific Islander origin
Native Hawaiian0.1%(299)
Guamanian0%(59)
Samoan0%(32)
Chamorro0%(10)
Marshallese0%(8)
Tongan0%(3)
Fijian0%(3)
Ancestry
Irish14.8%(85,505)
German11.7%(67,470)
Italian9.6%(55,298)
English9.2%(53,436)
Polish4.5%(26,166)
American3.2%(18,604)
Subsaharan African2.4%(14,023)
West Indian1.5%(8,472)
Scottish1.5%(8,436)
French1.1%(6,153)
Jamaican0.9%(4,990)
Arab0.7%(4,249)
+ 47 more ancestry groups with data
Welsh0.7%(3,931)
Ukrainian0.6%(3,562)
Russian0.6%(3,455)
Swedish0.6%(3,213)
Dutch0.5%(3,133)
Scotch-Irish0.5%(2,671)
Greek0.4%(2,594)
Norwegian0.4%(2,396)
Nigerian0.4%(2,063)
Hungarian0.3%(1,794)
British0.3%(1,500)
Haitian0.3%(1,500)
Ghanaian0.3%(1,498)
Lithuanian0.2%(1,441)
Slovak0.2%(1,408)
Czech0.2%(1,343)
French Canadian0.2%(1,191)
Egyptian0.2%(1,190)
Turkish0.2%(1,156)
Kenyan0.2%(997)
Trinidadian & Tobagonian0.2%(988)
Austrian0.2%(951)
Canadian0.1%(751)
Danish0.1%(742)
Swiss0.1%(740)
Portuguese0.1%(718)
Lebanese0.1%(578)
Barbadian0.1%(498)
Ethiopian0.1%(464)
Bulgarian0.1%(402)
Romanian0.1%(388)
Finnish0.1%(364)
Moroccan0.1%(348)
Iranian0.1%(347)
Guyanese0.1%(342)
Croatian0.1%(321)
Belgian0%(262)
Serbian0%(250)
Syrian0%(178)
Slovene0%(168)
Latvian0%(155)
Jordanian0%(121)
Brazilian0%(107)
Armenian0%(103)
Australian0%(82)
Israeli0%(81)
Palestinian0%(52)
Section 05
Education
High school or higher
92.6%
+7.1 ptssince 2000
from 85.5% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Section 08
People & community
Marital status
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
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Compare New Castle County to nearby counties
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Income$79,960−12%
Home value$239,500−32%
Population66,280−89%
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NEW CASTLE COUNTY VS
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Home value$343,400−2%
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NEW CASTLE COUNTY VS
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Home value$332,200−6%
Population580,937−1%
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NEW CASTLE COUNTY VS
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Frequently asked
How many people live in New Castle County, Delaware?
New Castle County, Delaware has about 577,961 residents according to the 2024 American Community Survey.
What is the median household income in New Castle County, Delaware?
The typical household in New Castle County, Delaware earns about $91,166 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 $352,200, and the typical rent is about $1,448 a month.
How educated are people in New Castle County, Delaware?
About 39.7% 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 10.1% 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 136,015 residents, a change of about 31 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