The County of Auxerre was a county in current central France, with its capital in Auxerre. It was commonly associated with the Duchy of Burgundy.

County of Auxerre Conté de Auxerre (French)
8th century–1370
Status	County
Capital	Auxerre
Common languages	Old French
Government	Monarchy
Count of Auxerre
• ~770	Peonius (first)
• 1370	John IV
Historical era	Middle Ages
• First count mentioned	8th century
• Sold to France	1370
Preceded by Succeeded by Francia Kingdom of France
Today part of	France

History

The first count attested by the sources is one Ermenaud, a companion of Charlemagne who reigned around 770. In 859 Charles the Bald handed over the county to his cousin Conrad II of Burgundy. When he revolted, the county was assigned to Robert the Strong. After the latter's death, Hugh the Abbot was count, but named a viscount in his lieu; later Auxerre was absorbed in Richard of Burgundy's dominion.

Count John IV sold it to the King of France in 1370. After the Treaty of Arras (1435) between Charles VII of France and Philip III of Burgundy, it returned once again to the latter. In 1477, with the annexion of Burgundy, it became definitively part of France.

List of counts

• Peonius, under Chlothar I
• Ermenaud I of Auxerre, ca. 758
• Ermenaud II of Auxerre ca. 800
• Ermenaud III of Auxerre, ca. 840
• Jouvert of Auxerre, ca. 853
• Conrad I of Auxerre, duke of Transjuran Burgundy, 859–864
• Robert the Strong, 864–866 following his marriage with Conrad's widow Adelaide of Tours
• Conrad II of Auxerre, son of Conrad and Adelaide, 853–876
• Hugh the Abbot, younger brother of Conrad II, 876–886
• Richard the Justiciar, 886–921, married Conrad II's daughter Adelaide
• Rudolph of France (also Raoul or Ralph), 921–923 until his election as King of France
• Hugh the Black, 923–952
• Gilbert of Chalon, 952–956
• Otto of Paris, 956–965
• Otto-Henry 965–1002
• Landerich of Monceau, 1002–1028
• Renauld, son of Landerich, 1028–1040
• Robert I, Duke of Burgundy, briefly in 1040
• William I, Count of Nevers, son of Renauld, 1040–1083
• Renauld II of Nevers (son) 1083–1089 (count of Auxerre and Nevers)
• William II, Count of Nevers (son) 1097–1148 (count of Auxerre, Tonnerre and Nevers)
• William III, Count of Nevers (son) 1148–1161 (count of Auxerre, Tonnerre and Nevers)
• William IV, Count of Nevers (son) 1161–1168 (count of Auxerre, Tonnerre and Nevers)
• Guy I of Nevers (brother) 1168–1175 (count of Tonnerre, Auxerre and Nevers)
• William V, Count of Nevers (son) 1175–1181 (count of Auxerre, Tonnerre and Nevers)
• Agnes I of Nevers (sister) 1181–1192
• Peter II of Courtenay 1184–1218 (married to Agnes)
• Mahault I of Coutenay (daughter) 1218–1257
• Hervé of Donzy 1218–1222 (married to Mahault)
• Agnes II of Donzy (daughter) 1218–1225 (deceased before her mother)
• Guy II of Châtillon, count of Saint Pol 1223–1225 (married to Agnes II)
• Gaucher of Châtillon (son)  ? (deceased)
• Yolande of Châtillon (daughter) ?–1254
• Archambaud of Dampierre ?–1249 (Archambaud IX Lord of Bourbon) (married to Yolande)
• Mahaut of Dampierre (daughter) 1257–1262
• Odo of Burgundy 1257–1262 (married to Mahaut)
• Alix of Burgundy (daughter) 1251–1290
• John I 1273–1290 (married to Alix, joint rulers)
• William VI the Great (son) 1290–1304
• John II (son) 1304–1361
• John III (son) 1361–1370
• John IV (son) 1370