| Jan Mastenbroek | |
| Fullname: | Johannes Christoffel Jan Mastenbroek[1] |
| Birth Date: | 5 July 1902 |
| Birth Place: | Dordrecht, Netherlands |
| Death Place: | Enschede, Netherlands |
| Manageryears1: | 1934–1938 |
| Managerclubs1: | Dutch East Indies National team |
Johannes Christoffel Jan Mastenbroek (5 July 1902 – 23 May 1978) was a Dutch football manager who coached the Dutch East Indies national team at the 1938 FIFA World Cup.[2]
Mastenbroek was born and raised in Dordrecht, son of Klaas Mastenbroek, a tailor, and Goverdina Rackwitsz. In 1924, he married Johanna van den Bovenkamp in Hengelo, at which time he was a schoolteacher.[3]
He was the chairman of the Nederlandsch-Indische Voetbal Unie (Dutch East Indies Football Union) and the vice-president of the Dutch East Indies Olympic Committee.