Si-Ma Yin
- Title: Si-Ma Yin
- Popularity: 1.025
- Known For: Acting
- Birthday: 1963-03-15
- Place of Birth: Hong Kong, British Crown Colony [now China]
- Homepage:
- Also Known As: Michelle Si-Ma Yin, 司馬燕, Shut-Ma Yin, Michelle Sze Ma-Yin, Michelle Sima Yan, Yin Szema, Seema Yin, Michelle Szema, 司马燕