Koji Ishii (born as Kouzou Ishii on July 1, 1960) is a Japanese voice actor, currently affiliated with Vi-Vo.
- Known For: Acting
- Birthday: 1960-07-01
- Place of Birth: Wakayama Prefecture, Japan
- Also Known As: 石井 浩司, 石井 康嗣, Kohji Ishii, Kōji Ishii, Kouzou Ishii, 石井 浩三, いしい こうじ, Kouji Ishii, 이시이 코지