William Lockhart
William Lockhart may refer to:
- William Lockhart of Lee, Oliver Cromwell's ambassador at Paris
- William Lockhart (MP), British member of parliament for Lanarkshire
- William Lockhart (surgeon), English medical missionary and fellow of the Royal College of Surgeons
- William Lockhart (priest), English Roman Catholic priest, convert from Anglicanism
- William Peddie Lockhart, Scottish preacher and cricketer
- William Thomas Lockhart, Ontario merchant and political figure
- Sir William Lockhart (Indian Army officer), British Indian Army general
- William Ewart Lockhart, Scottish Victorian painter
- William Mustart Lockhart, Scottish topographical painter