Retno Kustijah (born 19 June 1942; as Retno Koestijah) is an Indonesian badminton player who competed internationally from the early 1960s to the early 1970s.
Though she played singles in high level events, Kustijah's greatest success came in the women's doubles with regular partner Minarni. They were the first of only two Indonesian teams to win women's doubles at the prestigious All England Championships (1968). Their titles together included the quadrennial Asian Games (1962, 1966), and the Malaysia (1966, 1967), Singapore (1967), New Zealand (1968), Canadian (1969), and U.S. (1969) Opens. Kustijah also won mixed doubles at the 1967 Malaysia Open with Tan Joe Hok and at the 1971 Asian Championships with Christian Hadinata. She was a member of Indonesian teams which finished second to Japan in the 1969 and 1972 Uber Cup (women's world team) championships.
Women's doubles
Mixed doubles
Women's doubles
Mixed doubles
Women's singles
Women's doubles
Mixed doubles
Women's doubles