- Delaware (/ˈdɛləwɛər/ DEL-ə-wair) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the nearby Delaware River, in turn named after Thomas West, 3rd Baron De La Warr, an English nobleman and Virginia’s first colonial governor.
