Gustav Fröhlich (also Frölich; 1902 – 17 April 1968) was a German-Australian swimmer and swimming coach.

On 2 October 1921 he set a world record of 1.14 minutes for the 100 metres backstroke.

He won two European medals, gold in Budapest in 1926 and bronze in the following year, 1927, both in backstroke,[2] as well as five national titles between 1921 and 1926.

He coached Lorraine Crapp to two gold records at the Melbourne Olympics in 1956.

[citation needed] He also coached Faith Leech who won medals at the Melbourne Olympics in 1956 and Judy-Joy Davies who won a medal at the London Olympics in 1948.