Mark Ryan

• Mark Ryan (actor), British film, television and theatre actor
• Mark F. Ryan, Irish revolutionary and author
• Mark Ryan (Australian politician), Labor member of the Legislative Assembly of Queensland
• Mark Ryan (guitarist), guitarist for Adam and the Ants
• Mark Ryan (Wisconsin politician), Wisconsin State Assemblyman
• Mark W. Ryan, music editor for film and television
• Mark Ryan, alias used by Canadian-Armenian music composer, songwriter and producer DerHova