Ranking of Delaware Counties By Population with Irish Ancestry in 2021

Based on the US Census ACS-5Yrs estimates, in 2021, there were 139.62K people in Delaware with Irish ancestry. Among all Delaware counties, New Castle County had the highest population with Irish ancestry (77.91K), followed by Sussex County (37.69K), and Kent County (24.02K).

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

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