Delaware / Counties by Population

Delaware Counties by Population

Below are the 3 Delaware counties sorted by population from 1 to 3 . The population data are from the 2020 American Community Survey. You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

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Rank County Population
1 New Castle County 558,306
2 Sussex County 230,249
3 Kent County 179,124

United States Census Bureau. B01001 SEX BY AGE, 2020 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 17 March 2022.


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