William Ker
William Ker may refer to:
- William Ker, Lord Ker (d.1618), eldest son of Robert Ker, 1st Earl of Roxburghe
- William Ker, 2nd Earl of Roxburghe (d.1675), Scottish nobleman
- William Paton Ker (1855-1923), Scottish literary scholar and essayist
- William Ker (footballer), Scottish international footballer in 1872
See also
- William Kerr (disambiguation)