Simon Yam Tat-Wah, born March 19, 1955, is a Hong Kong actor and film producer.
- Known For: Acting
- Birthday: 1955-03-19
- Place of Birth: Hong Kong, British Crown Colony [now China]
- Also Known As: 임달화, Simon Yam Tat-Wah, 任達華, Simon Yum, Simon Yan, Simon Yau, Ren Da-Hua, Yam Tat-Wah, 任达华, Ren Dahua