William Drummond, 4th Viscount Strathallan (1690 – 16 April 1746) was a Scottish peer and Jacobite, who died at the Battle of Culloden. Pardoned for his part in the 1715 Rising, he raised a troop of cavalry for Prince Charles in 1745 and appointed Jacobite Governor of Perth. While the main army invaded England, he remained in Scotland to recruit additional troops and was replaced by Lord John Drummond in late November 1745. He died at Culloden in April 1746.