| Ioannis Milonas | |
| Birth Date: | 27 July 1969 |
| Birth Place: | Trikala, Greece |
| Height Ft: | 6 |
| Height In: | 7.5 |
| Nationality: | Greek |
| Draft Year: | 1991 |
| Career Start: | 1989 |
| Career End: | 2008 |
| Career Position: | Small forward |
| Years1: | 1989–1997 |
| Team1: | Peristeri |
| Years2: | 1997–1998 |
| Team2: | Apollon Patras |
| Years3: | 1999–2000 |
| Team3: | Dafni |
| Years4: | 2005–2007 |
| Team4: | Faros |
| Years5: | 2007–2008 |
| Team5: | Palaimon Korinthou |
Ioannis Milonas (alternate spelling: Giannis) (Greek, Modern (1453-);: Γιάννης Μυλωνάς; born July 27, 1969, in Trikala, Greece) is a retired Greek professional basketball player. At a height of 2.02 m (6' 7"), he played at the small forward position.
Milonas began playing basketball with Danaos Trikallon. In his pro career, he then played with Peristeri from 1989 to 1997. He also played with Apollon Patras (1997–98), Dafni (1999–00), and Faros Keratsini (2005–07).
Milonas was a member of the senior men's Greek national basketball team. With Greece's senior national team, he played at EuroBasket 1991. He was also a member of the Greek national team that finished in 4th place at the 1994 FIBA World Championship.