Largest Counties in Delaware

There are a total of 3 counties or county equivalents in the U.S. state of Delaware. Among them, the five biggest counties by population are New Castle, Sussex, and Kent. In the following table, you will see the list of all counties in Delaware, each with population, land area, density and the time of establishment.

Rank County Population County Seat Established Area (km2) Density
1 New Castle County 538,468 Wilmington 1664 1,279 421.01
2 Sussex County 197,134 Georgetown 1664 3,098 63.63
3 Kent County 162,299 Dover 1680 2,072 78.33

Largest Counties in Delaware

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