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Population per Square Mile in Delaware, by County

Population per Square Mile for every county in Delaware, ranked. The highest is New Castle County at 1,355.6 and the lowest is Sussex County at 273.1.

Delaware: 524.1 · United States: n/a · median county in Delaware: 320.1

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#County Population per Square Mile
1New Castle County1,355.6
2Kent County320.1
3Sussex County273.1

People divided by land area. Water is excluded, so lake and coastal counties are not unfairly diluted.

Source: ACS 2020-2024 5-Year Estimates, 2024.

Delaware ranks 8th of 52 states for population per square mile.

Population per Square Mile in other states

Other statistics for Delaware by county