Ron Polonsky (Hebrew: רון פולונסקי; born 28 March 2001) is an Israeli Olympic swimmer.

[6] In July 2019 at the 2019 European Junior Championships, he won a silver medal in Kazan, Russia, in the 200 L IM in a time of 1:59.98.

[6] In December 2019 at the Swim Cup Amsterdam in the Netherlands, Polonsky won the silver medal in the 200 L IM in a time of 1:59.45.

[6] In December 2020 at the 2020 Rotterdam Qualification Meet in the Netherlands at 19 years old Polonsky won the gold medal in the 200 L IM in a time of 1:59.67.

[3] In June 2023 at the Internazionali di Nuoto - 59 Sette Colli in Rome, Italy, Polonsky won the bronze medal in the 200 L IM in a time of 2:00.04.

[5] In August 2023 at the 2023 European U-23 Swimming Championships in Dublin, Ireland, he won the silver medal in the 200 L IM in a time of 1:58.07.

[6] In March 2024 at the NCAA Division I Mens Championships in Indianapolis, Indiana, Polonsky won the silver medal in the 100 Y Breast in 50.87.

[7] That same month at the Israel Olympic Trials, Polonsky won a gold medal in the 200m Medley with a time of 1:58.79.