Janusz Tadeusz Kusociński (15 January 1907 – 21 June 1940) was a Polish athlete, winner in the 10,000 meters event at the 1932 Summer Olympics.

In his first competition at the Polish National Championships, Kusociński surprisingly won the 5000 m and cross country titles.

At the Olympics, Kusociński won a close battle against the Finns Volmari Iso-Hollo and Lasse Virtanen in the 10 000 m, with a world season's best time of 30:11.4.

[1][5] Janusz Kusociński was arrested by the Gestapo on 26 March 1940 during the AB Action and imprisoned in Mokotów Prison.

[7] On 12 August 2009, he was posthumously awarded the Commander's Cross with Star of the Order of Polonia Restituta, "for outstanding contribution to the independence of the Polish Republic, for sporting achievements in the field of athletics".