Nina Dittrich (born November 20, 1990 in Vienna) is an Austrian swimmer, who specialized in freestyle and butterfly events.
She is a multiple-time Austrian champion, a five-time national record holder, and also, a current member of Simmering Swimming Club (German: Schwimmverein Schwechat Simmering) in Schwechat.
Dittrich is also the daughter of Ulrike Bauer, an Austrian record holder in both 100 and 200 m breaststroke, and Kurt Dittrich, a sprint butterfly swimmer who competed at the 1980 Summer Olympics in Moscow.