William Windham may refer to:
William Windham (of Earsham, senior) (died 1730), Member of Parliament 1722–1730 William Windham (of Earsham, junior) (c. 1706–1789), son of the above, Member of Parliament 1766–1768 William Windham (rower) (1926–2021), Olympic rower William Windham Sr. (1717–1761), of Felbrigg, traveler and militia advocate William Windham (1750–1810), of Felbrigg, son of the above, Whig statesman William Lukin Windham (1768–1833), Royal Navy officer William Windham (Liberal politician) (1802–1854), son of the above, Member of Parliament 1832–1835 William Frederick Windham (1840–1866), heir to Felbrigg Hall in Norfolk
See also William Wyndham (disambiguation) William Windom (politician) (1827–1891), American politician William Windom (actor) (1923–2012), American actor, great-grandson of the above