The Isle of Portland is a limestone tied island, 4 miles long by 1.7 miles wide, in the English Channel. Portland is 5 miles south of the resort of Weymouth, forming the southernmost point of the county of Dorset, England. A barrier beach called Chesil Beach joins it to the mainland. The A354 road passes down the Portland end of the beach and then over the Fleet Lagoon by bridge to the mainland. Portland and Weymouth together form the borough of Weymouth and Portland. The population of Portland is 12,400.
Portland is a central part of the Jurassic Coast, a World Heritage Site on the Dorset and east Devon coast, important for its geology and landforms. Portland stone, famous for its use in British and world architecture, including St Paul's Cathedral and the United Nations Headquarters, continues to be quarried.
Coordinates 50°32'11.53" N -2°26'34.328" E