New Castle County, DE ZIP Codes
Delaware (DE) · 52 ZIP codes · 17 cities
52
ZIP codes
571,708
population (2021)
+6.2%
pop change since 2010
10003
FIPS code
New Castle County ZIP code map
About New Castle County
New Castle County is located in Delaware and contains 52 ZIP codes across 17 cities and communities.
The county's population was 571,708 as of 2021,
an increase of
6.2% from 538,479 in 2010.
The timezone is Central Time (observes DST).
The Federal Information Processing System (FIPS) code for New Castle County is 10003.
| Population | |
|---|---|
| 2021 population | 571,708 |
| 2010 population | 538,479 |
| Change | +6.2% |
| County details | |
|---|---|
| State | Delaware |
| FIPS code | 10003 |
| Timezone | Central |
| Daylight saving | Yes |
Cities in New Castle County
Bear
Claymont
Delaware City
Hockessin
Kirkwood
Middletown
Montchanin
New Castle
Newark
Odessa
Port Penn
Rockland
Saint Georges
Townsend
Wilmington
Winterthur
Yorklyn
ZIP codes for New Castle County, DE (52)
Demographics & statistics
562,816
Population
39.4
Median age
$88,420
Median household income
$44,908
Per capita income
$307,143
Median home value
$1,249
Median monthly rent
66.3%
Home ownership
9.6%
Poverty rate
5.1%
Unemployment
161,596
Housing units
42.6%
Bachelor's or higher
Age distribution
Male
Female
14,578
Under 5
16,658
14,579
5–9
16,658
16,927
10–14
19,342
17,990
15–19
20,556
16,772
20–24
19,164
36,920
25–34
42,188
33,476
35–44
38,252
33,249
45–54
37,992
17,793
55–59
20,331
17,842
60–64
20,387
25,184
65–74
28,776
12,566
75–84
14,358
4,797
85+
5,481
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 120,138 | 19.2% |
| 18 and over | 442,678 | 80.8% |
| 65 and over | 91,162 | 15.9% |
| Median age | 39.4 years | |
Race & ethnicity
White
54.6%
Black or African American
23.7%
Hispanic or Latino
6.5%
Two or more races
5.8%
Asian
5.5%
Other race
3.6%
American Indian / Alaska Native
0.2%
| Group | Count | % |
|---|---|---|
| White | 328,557 | 54.6% |
| Black or African American | 142,987 | 23.7% |
| Hispanic or Latino | 39,245 | 6.5% |
| Two or more races | 34,888 | 5.8% |
| Asian | 33,221 | 5.5% |
| Other race | 21,874 | 3.6% |
| American Indian / Alaska Native | 1,101 | 0.2% |
Household income
Under $10k
4.5%
$10k–$15k
2.5%
$15k–$25k
4.7%
$25k–$35k
10.8%
$35k–$50k
8.1%
$50k–$75k
13.6%
$75k–$100k
11.5%
$100k–$150k
16.5%
$150k–$200k
9.8%
$200k+
13.3%
| Range | % of households |
|---|---|
| Under $10k | 4.5% |
| $10k–$15k | 2.5% |
| $15k–$25k | 4.7% |
| $25k–$35k | 10.8% |
| $35k–$50k | 8.1% |
| $50k–$75k | 13.6% |
| $75k–$100k | 11.5% |
| $100k–$150k | 16.5% |
| $150k–$200k | 9.8% |
| $200k+ | 13.3% |
| Median income | $88,420 |
Housing
Home values
Under $50k
2.8%
$50k–$100k
3.0%
$100k–$150k
4.6%
$150k–$200k
8.2%
$200k–$300k
24.8%
$300k–$500k
36.1%
$500k–$1M
13.2%
$1M+
2.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $307,143 |
| Median rent / month | $1,249 |
| Owner occupied | 66.3% |
| Renter occupied | 29.0% |
| Vacant | 5.4% |
| Single-family detached | 53.3% |
| Large apartment buildings | 8.1% |
| Mobile homes | 1.5% |
| Median rooms | 5.9 |
| Avg household size (owned) | 2.33 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.4% |
| 2010–2019 | 5.9% |
| 2000–2009 | 9.2% |
| 1990–1999 | 10.2% |
| 1980–1989 | 9.9% |
| 1970–1979 | 10.3% |
| 1960–1969 | 13.3% |
| 1950–1959 | 13.8% |
| 1940–1949 | 5.9% |
| 1939 or earlier | 16.3% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.2% |
| 1 bedroom | 9.5% |
| 2 bedrooms | 22.8% |
| 3 bedrooms | 33.6% |
| 4 bedrooms | 22.1% |
| 5+ bedrooms | 5.1% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 6.8% |
| 1 vehicle | 37.1% |
| 2 vehicles | 34.6% |
| 3 or more | 16.7% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 49.6% |
| Electricity | 31.8% |
| Propane / LP gas | 2.8% |
| Fuel oil | 9.8% |
| Wood | 0.4% |
| Solar | 0.1% |
| No fuel used | 0.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 96,992 | 40.3% |
| Cohabiting couple | 15,980 | 6.4% |
| Male householder, no spouse | 39,251 | 21.0% |
| Female householder, no spouse | 66,101 | 27.6% |
| Households with children under 18 | 61,531 | 25.2% |
| Households with seniors (65+) | 64,870 | 27.7% |
| Average household size | 2.23 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 43.6% | 36.2% |
| Married | 44.5% | 38.5% |
| Separated | 1.1% | 1.6% |
| Widowed | 2.5% | 7.9% |
| Divorced | 8.3% | 11.1% |
Education
Less than 9th grade
2.1%
Some HS, no diploma
4.1%
HS graduate
25.1%
Some college, no degree
19.3%
Associate's degree
6.8%
Bachelor's degree
25.9%
Graduate / professional
16.7%
| Metric | % |
|---|---|
| HS diploma or higher | 93.8% |
| Bachelor's or higher | 42.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 8,838 | 6.2% |
| Kindergarten | 5,767 | 4.1% |
| Elementary school | 53,741 | 36.9% |
| High school | 29,756 | 20.6% |
| College / grad school | 41,923 | 27.4% |
Employment
Industry of employment
Education & healthcare
23.9%
Professional & management
12.2%
Finance & real estate
10.9%
Retail trade
10.3%
Arts, food & hospitality
8.4%
Manufacturing
6.7%
Construction
5.5%
Transportation & utilities
5.4%
Public administration
4.6%
Other services
3.9%
Wholesale trade
1.7%
Information
1.1%
Agriculture & mining
0.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 45.7% |
| Service | 15.6% |
| Sales & office | 18.1% |
| Natural resources & construction | 6.5% |
| Production & transportation | 9.3% |
Employment type
| Type | % |
|---|---|
| Private sector | 77.0% |
| Government | 13.6% |
| Self-employed | 4.4% |
| Unpaid family workers | 0.3% |
Commute
| Method | % |
|---|---|
| Drive alone | 66.9% |
| Carpool | 7.3% |
| Public transit | 2.8% |
| Walk | 3.6% |
| Other means | 1.3% |
| Avg commute (minutes) | 23.4 |
Poverty
All people
9.6%
Under 18 years
13.2%
18 and over
8.6%
Married-couple families
3.5%
Female-led households
16.1%
Income support
| Source | % of households |
|---|---|
| Social Security | 28.3% |
| Retirement income | 29.1% |
| Supplemental Security | 4.0% |
| Cash public assistance | 2.0% |
| Food stamps / SNAP | 8.3% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 30.5% |
| High cholesterol | 28.8% |
| Heart disease | 5.3% |
| Stroke | 2.6% |
| Asthma | 10.0% |
| Arthritis | 20.2% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.4% |
| Cancer | 5.8% |
| Behavior / access | % |
|---|---|
| Binge drinking | 16.4% |
| No physical activity | 21.6% |
| Less than 7 hrs sleep | 31.7% |
| Fair or poor health | 12.5% |
| Poor mental health | 13.2% |
| Poor physical health | 9.2% |
| No health insurance | 12.5% |
| Visited doctor (checkup) | 70.5% |
| Visited dentist | 63.7% |
| Cholesterol screening | 85.2% |
| Teeth loss | 10.3% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 27,985 | 5.6% |
| Disability | % |
|---|---|
| Any disability | 11.9% |
| Under 18 | 6.3% |
| 18–64 years | 9.2% |
| 65 and over | 28.7% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 76.9% |
| Public insurance | 32.4% |
| Uninsured under 19 | 2.9% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 531,580 | 95.0% |
| Spanish | 27,881 | 4.3% |
| Other Indo-European | 15,975 | 2.3% |
| Asian & Pacific Islander | 4,266 | 0.7% |
| Other languages | 5,805 | 1.0% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 495,798 | 90.0% |
| Born in same state | 485,349 | 88.5% |
| Born in different state | 252,500 | 46.5% |
| Foreign born | 10,449 | 1.5% |
| Naturalized citizen | 67,018 | 10.0% |
| Not a US citizen | 36,518 | 51.6% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 77,978 | 13.9% |
| French | 49,403 | 8.8% |
| Arab | 16,130 | 2.9% |
| English | 4,087 | 0.7% |
| Polish | 2,140 | 0.4% |
| Ancestry | Count | % |
|---|---|---|
| Irish | 1,856 | 0.3% |
| Norwegian | 1,371 | 0.2% |
| German | 1,237 | 0.2% |
| Dutch | 767 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 41.5% |
| Internet access | 91.2% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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