Glasserton is a civil parish in Dumfries and Galloway, south-west Scotland. It is on the Machars peninsula, in the traditional county of Wigtownshire. The parish is about 8 miles (13 km) in length, varying in breadth from 1 to 3 miles (1.6 to 4.8 km), and contains 13,477 acres (54.54 km2).