Hanna Klein (born 6 April 1993)[1] is a German middle- and long-distance runner.

Klein won several German national titles outdoors and indoors (1500 m, 5000 m, 3000 m).

[1] After her bronze medal for the 1500 m at the 2021 European Indoor Championships in Toruń, Poland, she secured her first major title with gold for the 3000 m at the 2023 edition in Istanbul.

It was the first time in her senior career (since 2015) that she outsprinted compatriot Konstanze Klosterhalfen who earned silver.

Klein was beaten by Klosterhalfen to gold at the German Indoor Championships the previous month and their win-loss record stood at 0–10 before.