Nina Kläy (born 19 June 1989) is a Swiss taekwondo practitioner.

She won a bronze medal in lightweight at the 2013 World Taekwondo Championships, after being defeated by Kim Hwi-lang in the semifinal.

She participated at the World Taekwondo Championships five times (2007, 2009, 2011, 2013, 2015).

Her achievements at the European Taekwondo Championships include a gold medal in 2014, and a bronze medal in 2006.

This biographical article related to taekwondo in Switzerland is a stub.