Dagsboro is a town in Sussex County, Delaware, United States. The population was 519 at the 2000 census. It is part of the Seaford, Delaware Micropolitan Statistical Area. Dagsboro, incorporated in the early 1900s, is a quiet town of 713, that is energized in summer by Delaware Route 26 beach traffic. The town, in the Indian River School District, was founded in 1747 and has been known as Blackfoot Town, Dagsbury and Dagsborough. It was named for General John Dagworthy, a Brigadier General of the Sussex County Militia during the American Revolutionary War. Dagsboro is home to Prince George's Chapel, an historic church maintained by the state of Delaware as a museum.