Guy III of Châtillon, Count of Saint-Pol

Guy III of Châtillon, Count of Saint-Pol (born after 1226, died 1289), was the second son of Count Hugh I of Blois. He received Saint-Pol in 1248, while his elder brother John took Blois. In 1255 he married Matilda of Brabant, and governed Artois as regent until 1265, when his stepson came of age.

He joined Louis IX on the Eighth Crusade in 1270 and Philip III's Aragón Crusade in 1284–1285. At Worringen in 1288 he captured the Count of Guelders and the archbishop of Cologne. He was buried at Cercamp Abbey.