Population in Delaware by County

Name: Population in Delaware
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Total population.

U.S. Census Bureau · ACS 5-year 2020-2024 · Updated November 2026

Delaware

1,021,191

Counties

Highest

New Castle

577,961

Lowest

Kent

187,604

All Delaware counties, ranked

#	Counties	Population
1	New Castle	577,961
2	Sussex	255,626
3	Kent	187,604

About this dataset

Total population. Source: ACS 5-year 2020-2024 Data Profile, variable DP05_0001E. Values in people.

Source: U.S. Census Bureau
Citation: U.S. Census Bureau, American Community Survey 5-Year Estimates Data Profiles (2020-2024), DP05_0001E
Vintage: ACS 5-year 2020-2024
License: Public domain (U.S. Census Bureau)
Unit: people
Available at: State · County · ZIP code
Territory roll-up: Summed across each territory
Last loaded: November 2026

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US Population nationwide