William Kelly
William Kelly is the name of the following people:
- William Kelly (Politician, 1786) (1786–1834), American politician
- William Kelly (inventor) (1811-1888), American inventor
- William Kelly (theologian) (1821-1906), Northern Irish theologian
- William Kelly (Politician, 1840) (1840-1907), New Zealand politician
- William Kelly (politician, 1877) (1877-1960), Australian politician
- William Kelly (soccer player) (1890-1920), English soccer player
- William Kelly (football goalkeeper) (fl. 1919), Irish football goalkeeper
- William McDonough Kelly († 2013), Canadian politician
- William Thomas Kelly (1877–1944), British politician
- William WJ Kelly (1814–1878), American politician