New Castle, DE Demographics

A map of New Castle's Population by Race

New Castle, Delaware has an estimated population of 5,579, a less than 1% change from the 5,551 recorded in the 2020 Census. The population is 60.4% White, 28.4% Black, 8.1% Hispanic, 1.4% Multiracial, 0.9% Asian, and 0.7% Native American/Other. This demographic dot map shows the population of New Castle, with one dot drawn for each person counted by the Census, color-coded by race.

New Castle has become less racially diverse since the 2020 Census. It is considerably less diverse than Delaware overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In New Castle, that probability was 57.0% in 2020 and 54.8% in the most recent ACS estimates.

New Castle is ranked the 21st most populous place in Delaware, out of 79 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). New Castle was ranked the 21st most populous place in the 2020 Census.

New Castle's White Population

3,369 residents of New Castle, or 60.4% of the population, identify as White. The share of White residents in New Castle is slightly higher than in Delaware overall, where 58.1% of the population is White. New Castle ranks 47th statewide in terms of White residents as a share of the population, out of 79 places.

Since the 2020 Census, New Castle's White population has grown by an estimated 3.2%. White residents' share of New Castle's population has increased from 58.8% to 60.4%.

New Castle is more White than neighboring Wilmington Manor (43.1% White), Newport (44.6% White), Elsmere (41.5% White), and Wilmington (29.3% White). New Castle is less White than neighboring Pennsville (84.4% White).

New Castle's Black Population

1,587 residents of New Castle, or 28.4% of the population, identify as Black. The share of Black residents in New Castle is higher than in Delaware overall, where 21.4% of the population is Black. New Castle ranks 18th statewide in terms of Black residents as a share of the population, out of 79 places.

Since the 2020 Census, New Castle's Black population has grown by an estimated 3.9%. Black residents' share of New Castle's population has increased from 27.5% to 28.4%.

New Castle is more Black than neighboring Wilmington Manor (22.5% Black), Newport (26.7% Black), Pennsville (3.2% Black), and Elsmere (18.2% Black). New Castle is less Black than neighboring Wilmington (51.6% Black).

New Castle's Asian Population

52 residents of New Castle, or 0.9% of the population, identify as Asian. The share of Asian residents in New Castle is slightly lower than in Delaware overall, where 4.3% of the population is Asian. New Castle ranks 41st statewide in terms of Asian residents as a share of the population, out of 79 places.

Since the 2020 Census, New Castle's Asian population has declined by an estimated 27.8%. Asian residents' share of New Castle's population has remained roughly unchanged at 0.9%.

New Castle is more Asian than neighboring Pennsville (0.4% Asian), and Elsmere (0% Asian). New Castle is less Asian than neighboring Wilmington Manor (4.5% Asian), Newport (1.4% Asian), and Wilmington (1.6% Asian).

New Castle's Hispanic Population

454 residents of New Castle, or 8.1% of the population, identify as Hispanic. The share of Hispanic residents in New Castle is slightly lower than in Delaware overall, where 11% of the population is Hispanic. New Castle ranks 31st statewide in terms of Hispanic residents as a share of the population, out of 79 places.

Since the 2020 Census, New Castle's Hispanic population has declined by an estimated 1.5%. Hispanic residents' share of New Castle's population has remained roughly unchanged at 8.1%.

New Castle is more Hispanic than neighboring Pennsville (6.9% Hispanic). New Castle is less Hispanic than neighboring Wilmington Manor (23.2% Hispanic), Newport (21% Hispanic), Elsmere (38.1% Hispanic), and Wilmington (11.9% Hispanic).

New Castle's Native American/Other Population

37 residents of New Castle, or 0.7% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in New Castle is comparable to the share in Delaware overall, where 0.6% of the population is Native American/Other. New Castle ranks 55th statewide in terms of Native American/Other residents as a share of the population, out of 79 places.

Since the 2020 Census, New Castle's Native American/Other population has grown by an estimated 12.1%. Native American/Other residents' share of New Castle's population has remained roughly unchanged at 0.7%.

New Castle is more Native American/Other than neighboring Newport (0% Native American/Other), and Elsmere (0.3% Native American/Other). New Castle is less Native American/Other than neighboring Wilmington Manor (1.8% Native American/Other), Pennsville (1.2% Native American/Other), and Wilmington (0.9% Native American/Other).

New Castle's Multiracial Population

80 residents of New Castle, or 1.4% of the population, identify as Multiracial. The share of Multiracial residents in New Castle is slightly lower than in Delaware overall, where 4.5% of the population is Multiracial. New Castle ranks 61st statewide in terms of Multiracial residents as a share of the population, out of 79 places.

Since the 2020 Census, New Castle's Multiracial population has declined by an estimated 58.8%. Multiracial residents' share of New Castle's population has decreased from 3.5% to 1.4%.

New Castle is less Multiracial than neighboring Wilmington Manor (5% Multiracial), Newport (6.3% Multiracial), Pennsville (3.9% Multiracial), Elsmere (1.9% Multiracial), and Wilmington (4.6% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.