Ranking of Delaware Counties By Population with American Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 48.99K people in Delaware with American ancestry. Among all Delaware counties, Sussex County had the highest population with American ancestry (18.36K), followed by New Castle County (15.73K), and Kent County (14.90K).

The chart and table below shows the top 3 counties with high number of people with American ancestry.

You can see similar information for other states and for other ancestry groups in Delaware.

Data Source: US Census Bureau.
Ranking of Delaware Counties By Population with American Ancestry in 2021
Sussex County
New Castle County
Kent County
Ranking of Delaware Counties By Population with American Ancestry in 2021
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Rank County Population
1 Sussex County 18362
2 New Castle County 15734
3 Kent County 14898