Sussex County, Delaware

Sussex County
Sussex County Courthouse in Georgetown
Location within the U.S. state of Delaware
Delaware's location within the U.S.
Coordinates: 38°41′N 75°20′W / 38.68°N 75.34°W / 38.68; -75.34
Country United States
State Delaware
FoundedAugust 8, 1683
Named afterSussex, England
SeatGeorgetown
Largest citySeaford
Area
  Total
1,196 sq mi (3,100 km2)
  Land936 sq mi (2,420 km2)
  Water260 sq mi (700 km2)  21.7%
Population
 (2020)
  Total
237,378
  Estimate 
(2024)
271,134
  Density253.61/sq mi (97.92/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional districtAt-large
Websitewww.sussexcountyde.gov

Sussex County is a county in the southern part of the U.S. state of Delaware, on the Delmarva Peninsula. As of the 2020 census, the population was 237,378, making it the state's second most populated county behind New Castle and ahead of Kent. The county seat is Georgetown.

The first European settlement in the state of Delaware was founded by the Dutch in 1631 near the present-day town of Lewes on the Atlantic Coast. However, Sussex County was not organized until 1683 under English colonial rule.

Sussex County forms the Seaford, Delaware, Micropolitan Statistical Area.