Portland Bill Lighthouse is a functioning lighthouse on the Isle of Portland, Dorset, England. The lighthouse is located at the very south of the island, warning coastal traffic off of Portland Bill. The lighthouse and its boundary walls are Grade II Listed and have been since May 1993.As Portland's largest and most recent lighthouse, the Trinity House operated Portland Bill Lighthouse is distinctively white and red striped, standing at a height of 41 metres (135 ft).