William Gardiner
William Gardiner is the name of the following people:
- William Gardiner (mathematician) († 1752), British mathematician
- William Gardiner (writer) (1766-1825), writer
- William Gardiner (composer, 1770) (1770-1853), British composer and musicologist
- William Gardiner (composer, 1986) (* 1986), Australian composer
- William Nelson Gardiner (1766–1814), Irish painter and engraver
- William Neville Gardiner (1748–1806), British officer and diplomat
- William Tudor Gardiner (1892–1953), American politician