William Swan
William or Bill Swan may refer to:
- Sir William Swan, 1st Baronet, of the Swan baronets
- Sir William Swan, 2nd Baronet, of the Swan baronets
- William Swan (silversmith), American silversmith
- William Swan (missionary), translator of the Bible into Mongolian
- William Swan (physicist), Scottish physicist
- William Graham Swan, American politician
- William Turnbull Swan, New Zealand politician
- William Swan (British Army officer), British Army officer and agriculturalist
- William Swan (aviation pioneer), rocketplane entrepreneur
- William Swan (actor), American actor
- Bill Swan (writer), Canadian children's author
- Billy Swan, American singer-songwriter
- Bill Swan (footballer), Australian rules footballer
- Bill Swan (sculptor), American designer and builder of roadside sculptures
- Will Swan (musician), American guitarist with post-hardcore band Dance Gavin Dance
- Will Swan (footballer), English footballer
- Bill Swan, American indie rock musician with Beulah