The county of Tonnerre (Latin pagus Tornodorensis) was east of Auxerre and south of Troyes, centred on the town of Tonnerre in the Yonne region of France.

Through marriage the family also gained the county of Bar-sur-Seine, although the Tonnerre family then became extinct two generations later, with Bar-sur-Seine passing to the counts of Brienne and the county of Tonnerre passing to the dukes of Nevers and Auxerre.

His grandson Louis II of Chalon got into a dispute with John the Fearless due to the kidnapping of Jeanne de Perellos, a lady of the Burgundian court, and opposed him politically - he thus had Tonnerre confiscated from him in 1414.

Philip the Good handed the county to Arthur de Richemont, who later became constable of France (known as Constable of Richemont) and duke of Brittany (1457–1458) to its brother-in-law.

However, it was returned to the previous Tonnerre family by the Treaty of Arras but the last male member of that family had died in the meantime and it passed to a sister of the last count by his marriage with Olivier de Husson.