| Jan Mielniczak | |
| Nationality: | Polish |
| Sport: | Field hockey |
| Birth Date: | 11 December 1954 |
| Birth Place: | Poznań, Poland |
| Death Place: | Poznań |
Jan Mielniczak (11 December 1954 - 13 August 2016) was a Polish field hockey player. He competed in the men's tournament at the 1980 Summer Olympics.[1]