Cornelia Sirch (born 23 October 1966 in Jena, Thuringia) is a former backstroke swimmer from East Germany, who won two bronze medals at the 1988 Summer Olympics in Seoul, South Korea. The 21-year-old triumphed in the 100 m and 200 m backstroke. In 1982 she was named Swimming World's European Swimmer of the Year, after winning 200 m backstroke at the World Championships in Guayaguil in a world record time of 2:09.91, becoming the first woman to dip under 2 minutes 10 seconds. The record was broken by the US's Betsy Mitchell in 1986 (2:08.60).