| Hem Simay | |
| Fullname: | Hem Simay |
| Birth Date: | 6 December 1987 |
| Birth Place: | Phnom Penh, People's Republic of Kampuchea (in present-day Cambodia) |
| Position: | Goalkeeper |
| Years1: | 2004–2012 |
| Clubs1: | Build Bright United |
| Years2: | 2012–2013 |
| Clubs2: | Kirivong Sok Sen Chey |
| Years3: | 2013 |
| Years4: | 2013–2019 |
| Clubs4: | Angkor Tiger |
| Years5: | 2021 |
| Clubs5: | Visakha |
| Nationalyears1: | 2008 |
| Nationalteam1: | Cambodia |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
Hem Simay (Central Khmer: ហែម ស៊ីម៉ៃ, UNGEGN: in Central Khmer pronounced as /haem simaj/; born 6 December 1987) is a footballer from Cambodia. He made his first appearance for the Cambodia national football team in 2008.