Shirou Saitou
- Title: Shirou Saitou
- Popularity: 4.432
- Known For: Acting
- Birthday:
- Place of Birth: Yamagata, Japan
- Homepage: http://www.bungakuza.com/member/prof/saitou-shirou.htm
- Also Known As: Saitou Shirou, 斎藤志郎, Shirō Saitō, Shirou Saitou, Shiro Saito, Shirô Saitô