Lewis Edwin Marsh (February 17, 1879 – March 4, 1936) was a Canadian athlete and referee, and one of the pioneers of sports journalism in Canada, working at the Toronto Star for 43 years.

He briefly served with the 87th Battalion (Canadian Grenadier Guards) in France before being sent back to Canada after being diagnosed with heart problems.

During a match in Toronto in 1921, Marsh surprised the wrestlers after 30 minutes of showmanship by telling them that it was time to stop their exhibition and wrestle a real contest.

He brought a similar attitude to his work as a boxing referee where, over the course of thousands of bouts, Marsh wasn't reluctant to demand action from the fighters.

In the late 1920s, he developed an interest in racing small outboard hydroplanes, which he called sea fleas.

At 14, in the first year after the launch of the Toronto Star, Marsh walked into the newspaper's office responding to a want ad and was hired as a copyboy.

Marsh became an avid fisherman and hunter in his 50s, and made a return to officiating as a hockey referee at the 1932 Winter Olympics in Lake Placid, New York.