Ziv Kalontarov (also "Kalontorov", "Kaluntarov", and "Kalntrov"; Hebrew: זיו קלונטרוב; born 15 January 1997) is an Israeli Olympic swimmer and the reigning European Games champion in the 50 m freestyle.

His time in the final established a new senior Israeli national swimming record in the 50 m freestyle.

It qualified him to represent Israel at the 2016 Summer Olympics in Rio de Janeiro, Brazil.

[8][9] He won a gold medal with a European Games record time of 22.16 in the 50 m freestyle and thereby won the European Junior Swimming Championships, on 27 June 2015, after also having the fastest times in both the heat and semi-final of the event.

[8][16] It also qualified Kalontarov to represent Israel at the 2016 Summer Olympics in Rio de Janeiro, Brazil, which he did.