| Issy ten Donkelaar | |
| Birth Date: | 1941 10, df=y |
| Birth Place: | Losser, Netherlands |
| Position: | defender |
| Years1: | 1962–1971 |
| Clubs1: | FC Twente |
| Years2: | 1971–1972 |
| Clubs2: | Heracles Almelo |
| Manageryears1: | 1994–1995 |
| Managerclubs1: | FC Twente |
Issy ten Donkelaar (born 7 October 1941) is a retired Dutch football defender and later manager.