(Welsh, Llochder), supposed by some to be the ancient Lescarum), a parliamentary borough and port of S. Wales, Glamorganshire, on the E. bank of the Lloughor River, near its mouth, 7 miles W.N.W. of Swansea, with which it is connected by railway, and to which it is a sub-port. A very inconvenient ferry, long established here, has been superseded by a wooden bridge. Vessels of 200 tons can come up to the town. In the vicinity are collieries and copper-works. Lloughor is a contributory borough to Swansea. Pop. (1831) 821.