|William III, Landgrave of Thuringia|
|Born||30 April 1425|
|Died||17 September 1482 (aged 57)|
|Noble family||House of Wettin|
|Spouse(s)||Anne of Luxembourg|
|Father||Frederick I, Elector of Saxony|
|Mother||Catherine of Brunswick and Lunenburg|
William III (30 April 1425 – 17 September 1482), called the Brave (in German Wilhelm der Tapfere), was landgrave of Thuringia (from 1445) and claimant duke of Luxemburg (from 1457). He is actually the second William to rule Thuringia, and in Luxembourg; he was the third Margrave of Meissen named William.