John Sigismund

John Sigismund may refer to:
 * John Sigismund, Elector of Brandenburg (1572–1619)
 * John Sigismund Tanner (1705–1775), chief engraver at the Royal Mint of Great Britain
 * John Sigismund Vasa (1652), Polish prince who died shortly after birth
 * John Sigismund Zápolya (1540–1571), King of Hungary and Prince of Transylvania

Johann Sigismund may refer to:
 * Johann Sigismund Elsholtz (1623–1688), German naturalist
 * Johann Sigismund Kusser (1660–1727), German-born composer
 * Johann Sigismund Riesch (1750–1821), Austrian military officer
 * Johann Sigismund Scholze (1705–1750), Silesian music anthologist and poet