Mary Mersch
- Birthday: 1887-01-04
- Deathday: 1956-02-26
- Place of birth: Los Angeles, California, USA
- Also know as: May Mersch
Mary Mersch (January 4, 1887 – February 26, 1956), sometimes credited as May Mersch, was an American actress active from the silent era up to 1938. She was under contract with Fox, and often worked with directors like William Farnum and Frank Lloyd.
