Ykens is a Flemish surname. Notable people with the surname include:
Catarina Ykens (I) (1608–after 1666), Flemish painter Catarina Ykens (II) (born 1659, death unknown), Flemish painter Frans Ykens (1601–1693), Flemish still life painter Johannes Ykens (1613–after 1680), Flemish painter and sculptor Peter Ykens (1648–1695), Flemish painter