William Swan
William Swan may refer to:
- William Swan (missionary) (1791–1866), translator of the Bible into Mongolian
- William Graham Swan (1821–1869), 19th-century American politician from Tennessee
- William Turnbull Swan (1828–1875), 19th-century politician from New Zealand
- Sir William Swan, 1st Baronet (1631-1680), of the Swan Baronets
- Sir William Swan, 2nd Baronet (1667-1712), of the Swan Baronets
- William Swan (physicist), Scottish physicist
- Bill Swan, Canadian children's author
- Bill Swan, American indie rock musician with Beulah
- Bill Swan (footballer), an Australian rules footballer for Port Melbourne and Williamstown
- Billy Swan, American singer-songwriter
- Will Swan, guitarist of American post-hardcore band Dance Gavin Dance