Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in New Castle County, DE was 141068.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in New Castle County, DE reached a record high of 141068.00000 in January of 2022 and a record low of 117395.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in New Castle County, DE - last updated from the United States Federal Reserve on May of 2024.