Thomas McCalzean, Lord Cliftonhall (pronounced and sometimes spelled McCalyeane, Macalzean or Macallyean) (c. 1520 – 1581) was a 16th-century Scottish judge, rising to be a Senator of the College of Justice and a local politician who was briefly Provost of Edinburgh in 1562 at the personal request of Mary Queen of Scots who sought a moderate influence during these troubled times.