Tatsuya Ishii
- Birthday: 1959-09-22
- Place of birth: Ibaraki, Japan
- Also know as: 石井竜也
Tatsuya Ishii (石井竜也, Ishii Tatsuya), also known as Tatuya Ishii (born September 22, 1959) is a Japanese singer-songwriter, artist, and industrial designer from Ibaraki Prefecture.
