Robert V of Auvergne (c. 1225 – 11 January 1277) was count of Auvergne from 1247 and Boulogne from 1265 until his death.

Robert was the first-born son of the count of Auvergne William X and the countess of Boulogne Adelaide of Brabant.^[1] His parents married before 1225, renouncing every right they had on the duchy of Lower Lorraine,^[1][2] that they had since Adelaide was the daughter of Henry I, Duke of Lower Lorraine.

In 1247, William X died and Robert inherited the county of Auvergne.^[1] His mother remarried with Arnold II of Wezemaal.^[1] The two guaranteed Robert that they would not demand any of the possessions he inherited from his father.^[3]

In 1259, Matilda II, Countess of Boulogne died.^[4] The Parlement of Paris ruled that her title would be inherited by Robert's mother, Adelaide.^{[citation needed]} When she died, in 1265, the tile passed to Robert himself.^[1]

In 1245, Robert married Èleonore of Baffie,^[5] daughter of William "the Elder" of Baffie and his wife, whose name is unknown.^[6] They had six children:

• William XI of Auvergne, count of Boulogne and Auvergne.^[6]
• Robert VI of Auvergne, count of Boulogne and Auvergne.^[6]
• Godfrey († 1302), who was started on the ecclesiastical path, but after finishing his studies, left the church and later died in the Battle of the Golden Spurs.^[6]
• Guy († 1336), bishop of Tournai and of Cambrai.^[6]
• Mathilde († after 1291), that married Stephen, lord of Mont-Saint-Jean.^[6]
• Marie († 1286), nun at Fontevraud Abbey.^[6]

French nobility
Preceded by William X	Count of Auvergne 1247–1277	Succeeded by William XI
Preceded by Adelaide of Brabant	Count of Boulogne 1265–1277	Succeeded by William II