Delaware Counties by Population

Below are the 3 Delaware counties sorted by population from largest to smallest. The population data are from the 2022 Population Estimates Program and 2021 American Community Survey.

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Rank County Population
1 New Castle County 575,494
2 Sussex County 255,956
3 Kent County 186,946

United States Census Bureau. B01001 SEX BY AGE, 2021 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 8 December 2022.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2022. U.S. Census Bureau, Population Division. Web. May 2023.


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