| Jan of Melsztyn | |
| House-Type: | Szlachta |
| Noble Family: | Tarnowski |
| Coa: | Leliwa |
| Father: | Spytek of Melsztyn |
| Mother: | Stanisława of Bogoria and Skotnik |
| Spouse: | Zofia of Książ |
| Spouse-Type: | Consort |
| Issue: | Spytek of Melsztyn Elżbieta of Melsztyn |
| Birth Date: | c. 1326 |
Jan of Melsztyn (Polish: Jan z Melsztyna or Polish: Jan Melsztyński) was a Polish nobleman (szlachcic).
Jan was owner of Melsztyn and Książ estates. He served as Łowczy of Kraków since 1339, castellan of Wojnice since 1345, voivode of the Sandomierz Voivodeship since 1361 and castellan of Kraków since 1360 or 1366.
His granddaughter Elizabeth Granowska became Queen consort of Poland.