Delaware is divided into 3 counties, each governed by its own local administration. Use this interactive map and powerful search tools to explore Delaware’s counties, major cities, towns, and ZIP codes.

Interactive Map of All Delaware Counties

Click on any county below to explore more about it.

No.	County Name	Largest City	County Map & Zip Code
1	New Castle	Wilmington	New Castle County Map Link
2	Kent	Dover	Kent County Map Link
3	Sussex	Seaford	Sussex County Map Link

Delaware County Map Download

You can download the Delaware County Map from below:

Frequently Asked Questions

The largest county in Delaware by land area is Sussex County. It covers the southern part of the state and is known for its beaches and rural landscapes. While New Castle County is the largest by Population.

The smallest county in Delaware by land area is New Castle County, covering approximately 494 square miles (1,279 km²). This county is located in the northern part of the state and is the most populous, with a population of around 570,719 as of the 2020 census.

Delaware has 3 counties. It’s the state with the fewest counties in the U.S.!

Source: Wikipedia, Census.gov