Waleran I of Luxembourg (died 5 June 1288 in the Battle of Worringen) was Lord of Ligny and La Roche around 1281.
Waleran was the second son of Henry V, Count of Luxembourg and Margaret of Bar. While his older brother Henry VI became Count of Luxembourg like their father, Waleran was the forefather and founder of what became the French branch of the House of Luxembourg, the so-called house of Luxembourg-Ligny.
Waleran married Jeanne, Dame de Beaurevoir, and had:
Henry II, died 1304, 1295 Lord of Ligny
Waleran II (1275–1354) Lord of Ligny, Roussy and Beauvoir, married Guyotte Châtelaine de Lille († 1338)
Philipotte
Elisabeth
Marguerite, nun
Marie (died 1337), married Jean de Ghistelles (killed in 1346 in the Battle of Crécy)
Waleran was killed together with his brother Henry VI, Count of Luxembourg in the Battle of Worringen against John I, Duke of Brabant. His eldest son, Henry II of Ligny, succeeded him.
Waleran of Luxembourg is one of the protagonists in Le Tournoi de Chauvency by trouvère Jacques Bretel.