Franko Grgić (born 31 January 2003) is a Croatian competitive swimmer in freestyle.

[1] With the time of 14:46.09 in World Junior Championship he is the fastest 16-year-old 1500m freestyle swimmer in history.

[2] He captured two gold medals in the 400 m freestyle and the 1500 m freestyle event at the 2019 European Youth Summer Olympic Festival (EYOF) in Baku, Azerbaijan.

[3] In 2019 he was nominated for the Piotr Nurowski “Best European Young Athlete” Prize awarded by the European Olympic Committees, subsequently he was awarded second place.

[4] In the same year he was awarded the best young Croatian athlete by the famous Sportske novosti magazine.