Charles Marin Eugster FRSM (26 July 1919 – 26 April 2017) was a UK-born Swiss track and field and sprint athlete and former dentist.

After spending a career as a dentist, he moved to Uitikon, Switzerland, on his pension.

He won more than 100 fitness awards in multiple sports, including bodybuilding and rowing.

[2] He won multiple medals at the World Masters Regatta.

[4] Eugster died on 26 April 2017 of complications following heart failure at the age of 97.