| Shinji Hirai | |
| Native Name Lang: | ja |
| Office: | Governor of Tottori Prefecture |
| Term Start: | 13 April 2007 |
| Alma Mater: | University of Tokyo |
| Predecessor: | Yoshihiro Katayama |
| Birth Date: | 1961 9, df=y |
| Birth Place: | Chiyoda, Tokyo, Japan |
| Party: | Independent |
is a Japanese politician, the governor of Tottori Prefecture in Japan, first elected in 2007. He graduated from the University of Tokyo with the B.L. degree in 1984 and joined the Ministry of Home Affairs upon graduation.