Dover is the capital and second-most populous city of the U.S. state of Delaware. It is also the county seat of Kent County and the principal city of the Dover metropolitan statistical area, which encompasses all of Kent County and is part of the Philadelphia–Wilmington–Camden, PA–NJ–DE–MD, combined statistical area. It is located on the St. Jones River in the Delaware River coastal plain. It was named by William Penn for Dover in Kent, England. As of 2020, its population was 39,403.

Delaware is a state in the Mid-Atlantic region of the United States. It borders Maryland to its south and west, Pennsylvania to its north, New Jersey to its northeast, and the Atlantic Ocean to its east. The state's name derives from the adjacent Delaware Bay, which in turn was named after Thomas West, 3rd Baron De La Warr, an English nobleman and the Colony of Virginia's first colonial-era governor.