| Jason Koster | |
| Fullname: | Jason Koster |
| Nationality: | New Zealand |
| Birth Date: | 11 March 1983 |
| Birth Place: | Burwood, Christchurch, New Zealand[1] |
| Country: | New Zealand |
| Sport: | Judo |
| Event: | Men's −100 kg |
| Updated: | 27 July 2014 |
Jason Koster (born 11 March 1983) is a New Zealand judoka. He competed in the men's 100 kg event at the 2014 Commonwealth Games where he won a bronze medal.[2]
Koster is married to the judoka Moira de Villiers.[3] They have a daughter together and he has a son from a previous relationship.[4]