Walter Oscar Rütt (12 September 1883 – 23 June 1964) was a German track cyclist.

He most notably won the sprint event at the 1913 UCI Track Cycling World Championships.

He also won three bronze medals in the same event prior to his victory.

Other notable non-championship victories of his include the Grand Prix de Paris in 1913, the Grand Prix de l'UVF in 1904 and 1909 and the Grand Prix de l'UCI [fr] in 1907.

This biographical article relating to German cycling is a stub.