Delaware Counties
There have only been three counties in Delaware, but the names have changed over time. Below is a chart showing the name changes over time.
 
 
In addition to the county subdivision of the state, each county is subdivided into Hundreds. To learn more about Hundreds, click here.
 
County
County Seat
History
New Castle
Wilmington
Original County (Formally New Amstel)
Kent
Dover
Created from Horrekill. Formerly known as St. Jones County.
Sussex
Georgetown
Created from Horrekill District. Formerly known as Deale County
 
Horrekill District is also known as Whorekill, Hoarkill District, Hoornkill District, Hoerenkill District, and Whorekill District.