Catharina Ykens II (born 1659) was a Flemish still life painter.
She was born in Antwerp in 1659, the daughter of Johannes Ykens and the sister of Peter Ykens, both painters. She apprenticed under her father and joined the Antwerp Guild in 1688. She became a Beguine and composed oil paintings. Her works often combined religious scenes with garlands of flowers.