Nika Zajc (born 10 September 2007) is a Slovenian-born Swiss rhythmic gymnast who formerly represented Slovenia.

In 2018, her family moved from Slovenia to Switzerland because of her father's job, and she started training at FSG Lucens.

[2] She competed at the 2022 Junior European Championships and placed 17th in the team competition out of 33 countries, together with her teammates Alja Ponikvar, Asja Pučnik and Ela Polak.

Zajc also competed at the Sofia World Cup, where she finished in 37th place in the all-around.

[6] She took 4th place in the all-around at the Slovenian Championships and won four bronze medals in all four apparatus finals.