Otylia Jędrzejczak, Polish swimmer
Otylia Jędrzejczak (Polish: [ɔˈtɨlja jɛndˈʐɛjtʂak] (listen); born 13 December 1983) is a Polish swimmer. She was the Olympic champion from 2004 Athens in the 200 metre butterfly. She finished 4th in this event in the 2008 Summer Olympics in Beijing, and also swam at the 2000 Summer Olympics in Sydney. In Athens 2004 she also silvered in 400 m freestyle and 100 m butterfly. Three times she broke the world record in the women's 200 m butterfly (once in the 25-metre pool).

Jędrzejczak was born in Ruda Śląska, Silesian Voivodship, Poland. She started swimming at the age of six as a measure to correct a slight curvature of the spine. At first she hated the sport. Her attitude towards it changed after she had won her first prize in a competition in Germany at the age of eight. Jędrzejczak took up swimming seriously in high school. Led by coach Maria Jakóbik, she won her first titles in the Junior European Championships in 1999. Medals in the Senior European Championships in 1999 and 2000 opened the way to her first Olympic appearance.

Jędrzejczak studied at the Academy of Physical Education in Warsaw (Akademia Wychowania Fizycznego w Warszawie). Her coach is Paweł Słomiński. She stands 187 cm (6 ft 1½ in) tall and wears a size 47 (EU)/14 (US) shoe.

For her sport achievements, she received the Knight's Cross of the Order of Polonia Restituta (5th Class) in 2004.