Shirou Saitou
- Title: Shirou Saitou
- Popularity: 5.722
- Known For: Acting
- Birthday: 1956-08-31
- Place of Birth: Yamagata, Japan
- Homepage: http://www.bungakuza.com/member/prof/saitou-shirou.htm
- Also Known As: Saitou Shirou, Shirō Saitō, Shiro Saito, Shirô Saitô, 斎藤 志郎