New Castle County, Delaware Population 2019

New Castle County, Delaware's estimated population is 556,419 with a growth rate of 0.18% in the past year according to the most recent United States census data. New Castle County, Delaware is the largest county in Delaware.

Year Population Growth Growth Rate
2018559,3352,9160.52%
2017556,4191,0160.18%
2016555,4031,7450.32%
2015553,6582,8070.51%
2014550,8512,4680.45%
2013548,3833,5220.65%
2012544,8612,9950.55%
2011541,8663,1160.58%
2010538,75096,80421.90%
1990441,94643,83111.01%
1980398,11512,2593.18%
1970385,85678,41025.50%
1960307,44688,56740.46%
1950218,87939,31721.90%
1940179,56218,53011.51%
1930161,03212,7938.63%
1920148,23925,05120.34%
1910123,18813,49112.30%
1900109,69712,51512.88%
189097,18219,46625.05%
188077,71614,20122.36%
187063,5158,71815.91%
186054,79712,01728.09%
185042,7809,66029.17%
184033,1203,40011.44%
183029,7201,8216.53%
182027,8993,47014.20%
181024,429-932-3.67%
180025,3615,67328.81%
179019,6880.00%

New Castle County, Delaware Population Growth

Population Data via

Population by Race

Race Population
White359,928
Black or African American136,608
Asian30,480
Two or More Races14,053
Some Other Race12,284
American Indian and Alaska Native1,499
Native Hawaiian and Other Pacific Islander184

New Castle County, Delaware Population Pyramid 2019

New Castle County, Delaware Median Age

37.8


Total

36.4


Male

39.3


Female

New Castle County, Delaware Adults

There are 433,046 adults, (78,998 of whom are seniors) in New Castle County, Delaware.

New Castle County, Delaware Age Dependency

56.8

Age Dependency Ratio

22.3

Old Age Dependency Ratio

34.5

Child Dependency Ratio

New Castle County, Delaware Sex Ratio

Female

286,218

51.57%

Male

268,818

48.43%

New Castle County, Delaware Households and Families

New Castle County, Delaware Renter vs Owner Occupied by Household Type

New Castle County, Delaware Household Types

Type Owner Renter
Married84.7%15.3%
All68.4%31.6%
Male61.6%38.4%
Non Family53.8%46.2%
Female52.7%47.3%

68.4%

Rate of Home Ownership

Type Count Average Size Owned
All202,6542.6568.4
Married94,4893.3184.7
Non Family70,8891.3153.8
Female27,6483.5152.7
Male9,6283.6461.6

3.28

Average Family Size

2.65

Average Household Size

6.3%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

New Castle County, Delaware Education

Education Attained Count Percentage
Less Than 9th Grade11,6683.09%
9th to 12th Grade22,5105.96%
High School Graduate112,11429.66%
Some College70,61518.68%
Associates Degree26,1556.92%
Bachelors Degree77,87520.60%
Graduate Degree57,02215.09%

New Castle County, Delaware Educational Attainment by Race

Name Total High School Bachelors
White238,090224,36792,477
Black87,63778,75721,400
Hispanic28,27218,4374,454
Asian20,77319,23015,220
Other Race7,1974,4481,012
Multiple Races4,4743,9651,537
Native American1,039868282
Islander1278529

The highest rate of high school graduation is among white people with a rate of 94.24%.

The highest rate of bachelors degrees is among asian people with a rate of 73.27%.

Name Average Male Female
Overall$44,999$51,251$39,451
Less Than High School$25,748$27,720$20,394
High School Grad$32,848$39,873$28,204
Some College$40,286$46,486$35,333
Bachelors Degree$58,504$66,627$50,954
Graduate Degree$74,356$89,286$64,157

$44,999

Average Earnings

$51,251

Average Male

$39,451

Average Female

New Castle County, Delaware Language

New Castle County, Delaware Language by Age

New Castle County, Delaware Language

85.44% of New Castle County, Delaware residents speak only English, while 14.56% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 7.20% of the population.

New Castle County, Delaware Poverty

New Castle County, Delaware Poverty by Race

Name Total In Poverty Poverty Rate
Black131,72424,30618.45%
White315,04123,6617.51%
Hispanic51,67012,34523.89%
Other11,9903,15126.28%
Multiple13,7002,62519.16%
Asian30,0092,2677.55%
Native1,45619413.32%
Islander175148.00%

11.91%

Overall Poverty Rate

10.73%

Male Poverty Rate

13.01%

Female Poverty Rate

Poverty in New Castle County, Delaware

The race most likely to be in poverty in New Castle County, Delaware is Other, with 26.28% below the poverty level.

The race least likely to be in poverty in New Castle County, Delaware is White, with 7.51% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.56%. Among those working part-time, it was 14.91%, and for those that did not work, the poverty rate was 20.96%.

Name Poverty
Less Than High School22.69%
High School14.13%
Some College8.21%
Bachelors or Greater3.36%
Name Poverty
Female Unemployed27.33%
Male Unemployed23.57%
Female Employed5.80%
Male Employed3.82%

New Castle County, Delaware Income

New Castle County, Delaware Income by Household Type

Name Median Mean
Households$68,336$90,792
Families$84,859$107,886
Married Families$103,400$127,301
Non Families$40,171$55,675

New Castle County, Delaware Marital Status

New Castle County, Delaware Marital Status

Marriage Rates

44.8%

Overall Marriage Rate

46.8%

Male Marriage Rate

42.9%

Female Marriage Rate

New Castle County, Delaware Married by Age and Sex

New Castle County, Delaware Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

New Castle County, Delaware Marital Status by Race

New Castle County, Delaware Veterans

30,760

Number of Veterans

28,282

Male Veterans

2,478

Female Veterans

War Veterans
Vietnam10,786
First Gulf War4,960
Second Gulf War3,864
Korea2,702
World War II1,664

New Castle County, Delaware Veterans by Race

Name Veterans % of Total
White22,3037.68%
Black7,5747.43%
Hispanic1,5394.46%
2 or More3845.98%
Asian2711.14%
Other1131.30%
Indian937.63%
Hawaiian2215.60%

New Castle County, Delaware Veterans by Education

6.58%

Veteran Poverty Rate

24.04%

Veteran Disability Rate

New Castle County, Delaware Employment Status

64.4%

Labor Force Participation

60.1%

Employment Rate

6.5%

Unemployment Rate

Population of Cities in New Castle County, Delaware

City 2010 Census 2016 Estimated Growth Growth Rate
Wilmington70852714425900.83%
Newark315133339818855.98%
Middletown1887120876200510.62%
Smyrna 1000111371137013.70%
Elsmere61316106-25-0.41%
New Castle52855357721.36%
Clayton 291231572458.41%
Townsend2049231326412.88%
Delaware City16951742472.77%
Bellefonte11931178-15-1.26%
Newport10551050-5-0.47%
Arden439450112.51%
Odessa36437282.20%
Ardentown26427393.41%
Ardencroft23123762.60%
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990