Delaware Population By County in 2019

Based on the US Census Vintage data estimates, in 2019, the population of Delaware was 976,668. Among all Delaware counties, New Castle[object Promise] had the highest population (559,941), followed by Sussex[object Promise] (235,235), and Kent[object Promise] (181,492). Kent[object Promise] was the least populated county (181,492).

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.