Peter I, Duke of Bourbon

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Peter I
Seal of Duke Peter
Duke of Bourbon
Reign	1341 – 1356
Predecessor	Louis I
Successor	Louis II
Count of Clermont-en-Beauvaisis
Reign	1341 – 1356
Predecessor	Louis I
Successor	Louis II
Born	1311
Died	19 September 1356 (aged 44–45) Poitiers, France
Spouse	Isabella of Valois ​ (m. 1336)​
Issue	Louis II, Duke of Bourbon Joanna, Queen of France Blanche, Queen of Castile Bonne, Duchess of Savoy Margaret of Bourbon
House	Bourbon
Father	Louis I, Duke of Bourbon
Mother	Mary of Avesnes

Peter I of Bourbon (Pierre Ier, Duc de Bourbon in French; 1311 – 19 September 1356) was the second Duke of Bourbon, from 1342 to his death. Peter was son of Louis I of Bourbon,^[1] whom he also succeeded as Grand Chamberlain of France, and Mary of Avesnes.

Peter is reported to have been somewhat mentally unstable, a trait of nervous breakdowns (presumably hereditary, if mental illness is hereditary) that showed clearly for example in his daughter Joan of Bourbon, the queen, and in her son, king Charles VI of France, as well as in Peter's only surviving son, Duke Louis II.