What is the population of New Castle County, DE?
New Castle County in Delaware has a population of 573,030, per Census ACS 5-Year estimates. The median household income is $89,901 and the median age is 39.2.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. New Castle County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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New Castle County in Delaware has a population of 573,030, per Census ACS 5-Year estimates. The median household income is $89,901 and the median age is 39.2.