Dunbarton is an alternative spelling of Dumbarton, a town in Scotland.

Dunbarton may also refer to:

Places Canada Dunbarton, a community of Pickering, Ontario

Scotland Dunbartonshire, a county Dunbartonshire (UK Parliament constituency) Dunbartonshire and Argyll & Bute, an administrative division

United States Dunbarton, New Hampshire Dunbarton, South Carolina Dunbarton, Wisconsin

Educational institutions Dunbarton College of the Holy Cross, former college in Washington, D.C., United States Dunbarton High School, Pickering, Ontario, Canada

See also Dumbarton (disambiguation)