Jadwiga Ksiazek (née Marko; born 6 April 1939, died 30 January 2019) was a female Polish volleyball player, a member of Poland women's national volleyball team in 1959–1969, a bronze medalist of the Olympic Games (Tokyo 1964, Mexico 1968), a bronze medalist of the World Championship 1962 and silver medalist of the European Championship 1963, three-time Polish Champion (1964, 1965, 1966).