Wigeric or Wideric (French: Wigéric or Wéderic) (died before 923) was the count of the Bidgau (pagus Bedensis) and held the rights of a count within the city of Trier. He received also the advocacy of the Abbey of Saint Rumbold at Mechelen from Charles III of France. From 915 or 916, he was the count palatine of Lotharingia. He was the founder of the House of Ardennes.
At the death of Louis the Child, the Lotharingians rejected the suzerainty of Conrad I and elected Charles of France as their king. At the time, the military authority in Lotharingia was assigned to Count Reginar I of Hainaut (died 915), but at his death it fell to Wigeric, who became count palatine, exercising as such the military authority in Lotharingia.
Wigeric founded the monastery of Hastière, of which he also assumed the advocacy. He married Cunigunda, daughter of Ermentrude and granddaughter of Louis II of France. Their children were:
- Frederick (died 978), count of Bar, the duke of Upper Lorraine from 959
- Adalberon (died 962), bishop of Metz
- Gilbert (died 964), count in the Ardennes
- Sigebert (fl. c. 942)
- Gozlin (died 942), count of Bidgau, married Uda of Metz, father of:
- Godfrey the Prisoner
- Adalberon, Archbishop of Reims
- Siegfried, count of Luxembourg
Some genealogies record two other children, Henry and Liutgard, who were in fact son and daughter of another Wigeric, son of Roric, a contemporary living in the shire of Bidgau-Trier.