| Giannis Mantzaris | |
| Fullname: | Ioannis Mantzaris |
| Birth Date: | 15 April 1996 |
| Birth Place: | Thessaloniki, Greece |
| Height: | 1.88 m |
| Currentclub: | Paniliakos |
| Position: | Goalkeeper |
| Youthclubs1: | Aris Thessaloniki |
| Years1: | 2014–2018 |
| Clubs1: | Aris Thessaloniki |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2015–2016 |
| Clubs2: | → APE Langada (loan) |
| Caps2: | 3 |
| Goals2: | 0 |
| Years3: | 2018–2019 |
| Clubs3: | Apollon Larissa |
| Caps3: | 29 |
| Goals3: | 0 |
| Years4: | 2019–2020 |
| Clubs4: | Platanias |
| Caps4: | 4 |
| Goals4: | 0 |
| Years5: | 2020 |
| Clubs5: | Kalamata |
| Caps5: | 1 |
| Goals5: | 0 |
| Years6: | 2020–2021 |
| Clubs6: | Diagoras |
| Caps6: | 0 |
| Goals6: | 0 |
| Years7: | 2021 |
| Clubs7: | Apollon Pontou |
| Caps7: | 1 |
| Goals7: | 0 |
| Years8: | 2021–2022 |
| Clubs8: | Apollon Larissa |
| Caps8: | 8 |
| Goals8: | 0 |
| Years9: | 2022– |
| Clubs9: | Paniliakos |
| Caps9: | 0 |
| Goals9: | 0 |
| Pcupdate: | 27 April 2022 |
Giannis Mantzaris (Greek, Modern (1453-);: Γιάννης Μαντζάρης; born 15 April 1996) is a Greek professional footballer who plays as a goalkeeper for Gamma Ethniki club Paniliakos.