In 2019, New Castle County, DE had a population of 559k people with a median age of 39.1 and a median household income of $76,328. Between 2018 and 2019 the population of New Castle County, DE declined from 559,335 to 558,753, a −0.104% decrease and its median household income grew from $69,479 to $76,328, a 9.86% increase.
The 5 largest ethnic groups in New Castle County, DE are White (Non-Hispanic) (56%), Black or African American (Non-Hispanic) (25%), White (Hispanic) (6.89%), Asian (Non-Hispanic) (5.38%), and Two+ (Non-Hispanic) (2.55%). 0% of the households in New Castle County, DE speak a non-English language at home as their primary language, and 93.9% of the residents in New Castle County, DE are U.S. citizens.
In 2019, the median property value in New Castle County, DE was $272,600, and the homeownership rate was 66.5%. Most people in New Castle County, DE drove alone to work, and the average commute time was 25.3 minutes. The average car ownership in New Castle County, DE was 2 cars per household.