Xénia Siska (born 3 November 1957) is a Hungarian track and field athlete who specialised in the 100 metres hurdles.
She is her country's best ever female sprint hurdler, holding the Hungarian record in the 100 m hurdles (12.76 seconds), as well as the 60 metres hurdles and 50 metres hurdles.
She is also a co-holder of the 4×100 metres relay national record.Her most significant achievement was a gold medal at the 1985 IAAF World Indoor Games in the 60 m hurdles event.
She was a semi-finalist at the 1980 Moscow Olympics and the 1983 World Championships in Athletics.
She was also twice a semi-finalist at the European Athletics Championships (1978 and 1986).