Richilde, Countess of Hainaut, Flemish consort and regent (b. c. 1018)

Richilde, Countess of Mons and Hainaut (c. 1018 – 15 March 1086), was a ruling countess of Hainaut from c. 1050 until 1076, in co-regency with her husband Baldwin VI of Flanders and son Baldwin II of Hainaut. She was also countess of Flanders by marriage to Baldwin VI. She ruled Flanders as regent during the minority of her son Arnulf III in 1070–1071.