Ziv Kalontarov is an 19 year old Israeli swimmer and the reigning European Games champion in the 50 m freestyle
In April 2015, Kalontarov won the International School Sport Federation (ISF) Swimming World Schools Championship in both the 50 m freestyle (in 22.39) and the 100 m freestyle (in 50.49) in Poznań, Poland.
At the age of 18 representing Israel at the 2015 European Games in Baku, Azerbaijan, 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.
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.