Irina Deriugina (Ukrainian: Ірина Дерюгина) born 11 January 1958 in Kiev) is a Ukrainian former individual Rhythmic Gymnast. She is the only Soviet rhythmic gymnast who possesses two all around world titles, which she won in 1977 and 1979. Her mother, Albina, was her coach. Her success influenced the further development of rhythmic gymnastics in Kiev.
At age 10 in 1968, Deriugina entered the National Ballet School, from 1976 until 1980 she was a student of the Kiev National Institute of Physical Culture. Deriugina was a member of the Soviet Rhythmic Gymnastics squad from 1972 until her retirement from the sport in 1982. After her retirement she was appointed the Ukrainian National Coach.
Deriugina was in charge of the RG technical organizing committee as Competition Director from 1988–1992. In her famous Kiev school, she trains (under the watchful eye of her mother) forty high level gymnasts and organizes every year one of the biggest rhythmic tournaments, the Deriugina Cup, started in 1992.
Deriugina was married to Oleh Blokhin, a Ukrainian soccer striker and coach who was European Footballer of the Year in 1975.
She was also a judge at both the 1988 Seoul and 1992 Barcelona Olympic Games. She was involved in a large judging scandal that took place at the 2000 European Championships in Zaragoza, Spain. Video was used to prove that she and 5 other judges, Natalia Stepanova (Belarus), Gabriele Stummer (Austria), Galina Marjina (Latvia), Ursula Sohlenkamp (Germany) and Natalia Lashtsinkaya (Russia), were guilty of discriminating against the gymnast, Olena Vitrychenko of Ukraine, in comparison to scores given to other gymnasts. In the end, the 6 guilty judges were suspended for one year and they could not go to the judging course in Rome. For the 2000 Sydney Olympics, those countries had to choose another judge who met the requirements of the Fédération Internationale de Gymnastique. This was the first time in Rhythmic Gymnastics history that such massive inappropriate behaviour was documented and penalized.