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New Castle County, Delaware's estimated population is 561,159 with a growth rate of 0.21% in the past year according to the most recent United States census data. New Castle County, Delaware is the null largest county in Delaware. The 2010 Population was 538,752 and has seen a growth of 4.16% since this time.
| Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2021 | 561,159 | 1,203 | 0.21% |
| 2020 | 559,956 | 1,203 | 0.22% |
| 2019 | 558,753 | 1,203 | 0.22% |
| 2018 | 557,550 | 1,574 | 0.28% |
| 2017 | 555,976 | 918 | 0.17% |
| 2016 | 555,058 | 1,570 | 0.28% |
| 2015 | 553,488 | 2,720 | 0.49% |
| 2014 | 550,768 | 2,437 | 0.44% |
| 2013 | 548,331 | 3,483 | 0.64% |
| 2012 | 544,848 | 2,939 | 0.54% |
| 2011 | 541,909 | 3,157 | 0.59% |
| 2010 | 538,752 | 96,806 | 21.90% |
| 1990 | 441,946 | 43,831 | 11.01% |
| 1980 | 398,115 | 12,259 | 3.18% |
| 1970 | 385,856 | 78,410 | 25.50% |
| 1960 | 307,446 | 88,567 | 40.46% |
| 1950 | 218,879 | 39,317 | 21.90% |
| 1940 | 179,562 | 18,530 | 11.51% |
| 1930 | 161,032 | 12,793 | 8.63% |
| 1920 | 148,239 | 25,051 | 20.34% |
| 1910 | 123,188 | 13,491 | 12.30% |
| 1900 | 109,697 | 12,515 | 12.88% |
| 1890 | 97,182 | 19,466 | 25.05% |
| 1880 | 77,716 | 14,201 | 22.36% |
| 1870 | 63,515 | 8,718 | 15.91% |
| 1860 | 54,797 | 12,017 | 28.09% |
| 1850 | 42,780 | 9,660 | 29.17% |
| 1840 | 33,120 | 3,400 | 11.44% |
| 1830 | 29,720 | 1,821 | 6.53% |
| 1820 | 27,899 | 3,470 | 14.20% |
| 1810 | 24,429 | -932 | -3.67% |
| 1800 | 25,361 | 5,673 | 28.81% |
| 1790 | 19,688 | 0.00% |
| Race | Population | Percentage |
|---|---|---|
| White | 357,185 | 64.22% |
| Black or African American | 139,960 | 25.17% |
| Asian | 30,704 | 5.52% |
| Two or More Races | 14,594 | 2.62% |
| Some Other Race | 11,877 | 2.14% |
| American Indian and Alaska Native | 1,663 | 0.30% |
| Native Hawaiian and Other Pacific Islander | 182 | 0.03% |
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 205,829 | 2.62 | 67.9 |
| Married | 95,520 | 3.27 | 84.1 |
| Non Family | 73,615 | 1.3 | 53.2 |
| Mujer | 26,851 | 3.56 | 53.5 |
| Masculino | 9,843 | 3.61 | 59.4 |
3.27
Average Family Size
2.62
Average Household Size
| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 11,498 | 3.00% |
| 9th to 12th Grade | 20,534 | 5.36% |
| High School Graduate | 118,233 | 30.84% |
| Some College | 67,553 | 17.62% |
| Associates Degree | 26,881 | 7.01% |
| Bachelors Degree | 80,158 | 20.91% |
| Graduate Degree | 58,469 | 15.25% |
| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 237,228 | 225,170 | 94,126 |
| Black | 91,358 | 83,734 | 23,237 |
| Hispanic | 29,941 | 19,229 | 4,822 |
| Asian | 21,030 | 19,567 | 14,632 |
| Other Race | 6,882 | 4,345 | 881 |
| 2+ Races | 5,116 | 4,641 | 2,096 |
| Native American | 1,175 | 959 | 298 |
| Islander | 128 | 113 | 11 |
The highest rate of high school graduation is among white people with a rate of 94.92%.
The highest rate of bachelors degrees is among asian people with a rate of 69.58%.
$47,152
Average Earnings
$53,204
Average Male
$40,967
Average Female
84.93% of New Castle County, Delaware residents speak only English, while 15.07% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 7.62% of the population.
| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| Black | 134,733 | 24,138 | 17.92% |
| White | 309,535 | 22,303 | 7.21% |
| Hispanic | 53,949 | 10,413 | 19.30% |
| Asian | 30,266 | 3,359 | 11.10% |
| Other | 11,516 | 2,582 | 22.42% |
| Multiple | 14,281 | 2,050 | 14.35% |
| Native | 1,633 | 197 | 12.06% |
| Islander | 176 | 10 | 5.68% |
11.38%
Overall Poverty Rate
10.27%
Male Poverty Rate
12.40%
Female Poverty Rate
The race most likely to be in poverty in New Castle County, Delaware is Other, with 22.42% below the poverty level.
The race least likely to be in poverty in New Castle County, Delaware is Islander, with 5.68% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.70%. Among those working part-time, it was 15.49%, and for those that did not work, the poverty rate was 19.21%.
45.0%
Overall Marriage Rate
47.5%
Male Marriage Rate
42.8%
Female Marriage Rate
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.
| Name | Veterans | % of Total |
|---|---|---|
| White | 20,727 | 7.17% |
| Black | 8,445 | 8.04% |
| Hispanic | 1,278 | 3.54% |
| 2+ Races | 343 | 4.73% |
| Asian | 319 | 1.34% |
| Other Race | 119 | 1.45% |
| Native American | 87 | 6.38% |
| Islander | 3 | 2.27% |
6.21%
Veteran Poverty Rate
23.91%
Veteran Disability Rate
65.4%
Labor Force Participation
61.4%
Employment Rate
5.9%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
88.48%
Native Born
11.52%
Foreign Born
5.96%
Non Citizen
5.56%
Naturalized
88.48% of New Castle County, Delaware residents were born in the United States, with 46.16% having been born in Delaware. 5.96% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.