Willelm Pitt (28. dæg Þrimilcemonðes 1759 oþ 23. dæg þæs Æfterran Geola 1806) wæs Brytisc rices rædbora se ðegnde swa þæs Cyninges Form Þegn for Breten þæm Cynerice fram 1783 oþ þæs cynedomes gæd mid Irlande in 1801 and swa Forma Þegn þæs Geānedan Cynerīces þæron oþ 1806 buton þrim wintrum. In Bereten stære is Pitt se iengsta Forma Þegn.
Pittes fæder wæs Willelm Pitt Form Eorl of Cethame, eac Forma Ðegn, and þy nemnað stærwriteras se ieldra Willelm 'Willelm Pitt se Ieldra' and his sunu is 'Willelm Pitt se Giengra'.
In his þegndome wæs Pitt eac Cancelere þære Exchequer.
Pittes cyning was Georgius III Cyning. In his dagum ætbyrste ða Frenciscan Onwendunge mid hiere gewinnum ofer Europan, and Brettas feahte wiþ Napoleone.