Delaware Counties by Population

The most populated counties in Delaware are New Castle County with 578,592, Sussex County at 263,509, and Kent County with 189,789. You can get the most current Census population data for all 3 Delaware counties, sorted from the most populous counties in Delaware to the least, according to the 2023 Population Estimates Program.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Delaware counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!

Download the newest population data for Delaware counties

↓ Download (.xlsx)

Free, Excel™ file.
Trusted by 12,695 businesses.

Rank County Population
1 New Castle County 578,592
2 Sussex County 263,509
3 Kent County 189,789

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2023. U.S. Census Bureau, Population Division. Web. March 2024.


Cubit logo

© Copyright 2024 Cubit Planning, Inc.