Sweet William may refer to:
* ''
Dianthus barbatus'', a species of flowering plant
* ''
Mustelus antarcticus,'' a species of shark
*
''Sweet William'' (novel), a 1975 novel by Beryl Bainbridge
*
''Sweet William'' (film), a 1980 British drama film, based on the novel
*
''Sweet William'' (short story collection), a short story collection in the Just William series by Richmal Crompton
* "
Lord William" or "Sweet William", a traditional Scottish folk ballad
{{disambiguation