David Chalmers, Lord Ormond (c. 1530 – 1592) was a 16th-century Scottish landowner, historian, judge, and Senator of the College of Justice. His name also appears as David Chambre and David Chambers and is title occasionally appears as Lord Ormand. He was a major figure in Edinburgh law and politics. His most notable contribution in history is as one of those accused of the murder of Lord Darnley and one of the persons organising the escape of Mary Queen of Scots from Lochleven Castle.
Born pre-Reformation, he appears to have retained strong Catholic allegiance through turbulent times.