Delaware Population By County in 2020

Based on the US Census Vintage data estimates, in 2020, the population of Delaware was 992,114. Among all Delaware counties, New Castle[object Promise] had the highest population (570,873), followed by Sussex[object Promise] (238,879), and Kent[object Promise] (182,362). Kent[object Promise] was the least populated county (182,362).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.