Guy of Dampierre (Dutch: Gwijde van Dampierre) (c. 1226 – 7 March 1305, Compiègne) was the Count of Flanders (1251–1305) and Marquis of Namur (1268–97). He was a prisoner of the French when his Flemings defeated the latter at the Battle of the Golden Spurs in 1302.Guy was the second son of William II of Dampierre and Margaret II of Flanders. The death of his elder brother William in a tournament made him joint Count of Flanders with his mother.