William Maclay may refer to: William Maclay (Pennsylvania politician, born 1737) (1737–1804), United States Senator from Pennsylvania William Maclay (Pennsylvania politician, born 1765) (1765–1825), United States Representative from Pennsylvania William Plunkett Maclay (1774–1842), United States Representative from Pennsylvania, nephew of the senator William B. Maclay (1812–1882), United States Representative from New York William P. Maclay (Medal of Honor) (1877–1943), Philippine Insurrection Medal of Honor recipient
See also William Macleay (disambiguation)