Katarzyna Kłys (née Piłocik, 23 April 1986) is a Polish judoka.

She represented Poland in the 70 kg event of the 2008 Summer Olympics and lost in the quarter-finals to Ronda Rousey.

[1] Four years later, she lost her first round match to Chen Fei in the 70 kg event of the 2012 Summer Olympics.

[1][2] Kłys is a two-time silver medalist in her weight class at the European championships (2007 and 2012).

[3] She won another silver medal in the team event of the 2010 European Judo Championships.