United States › Delaware › New Castle County

New Castle County, Delaware

146,544 Black residents · 25.7% of the county · ranked 1 of 3 in Delaware by Black population

The gazetteer enters New Castle County, Delaware, on its published figures: a total population of 570,719 in 2020, with 146,544 Black residents counted alone — 25.7% of the county, a share that fixes the county's place in the state's pattern.

Black share of state population — Delaware highlighted — the state in the national tile map, shaded by the Black share of each state's population. Source: U.S. Census Bureau, 2020 Census (PL 94-171), Table P1.

Civic Snapshot

Measure	Figure
Total population, 2020	570,719
Black residents (alone), 2020	146,544
Black share of the county, 2020	25.7%
Rank by Black population among Delaware counties	1 of 3

Source: U.S. Census Bureau, 2020 Census Redistricting File (Public Law 94-171), Table P1 (race). Trend: U.S. Census Bureau, 2010 Census Redistricting File (Public Law 94-171), Table P1.

Population Trend

The published record across two censuses for New Castle County: 127,786 Black residents in 2010, 146,544 in 2020 — grew by 14.7% over the decade, with the Black share of the whole moving from 23.7% to 25.7%.

Source: U.S. Census Bureau, 2020 Census Redistricting File (Public Law 94-171), Table P1 (race). Trend: U.S. Census Bureau, 2010 Census Redistricting File (Public Law 94-171), Table P1.

The Record

New Castle County is one of 3 counties and county equivalents the Census Bureau counts in Delaware. Together they hold the state's 218,899 Black residents, and New Castle County's 146,544 of them give it rank 1 of 3 in that order. The county is the gazetteer's middle geography — larger than the places inside it, smaller than the state frame — and the figures printed here for New Castle County are the published redistricting counts, reproduced as released.

Institutions

For the institutions of Black New Castle County — its congregations, schools, and civic life — this gazetteer points to the place entries inside the county's borders, where each town and community is entered on its own count. The New Castle County page is their frame: 570,719 residents, 146,544 of them Black, and the movement of the last two censuses.