| Petros Bagalianis | |
| Birth Date: | 6 February 2001 |
| Birth Place: | Kallikrateia, Greece |
| Height: | 1.85 m |
| Currentclub: | Olympiacos B |
| Clubnumber: | 40 |
| Position: | Centre-back |
| Youthyears1: | 2009–2019 |
| Youthclubs1: | Aris Thessaloniki |
| Years1: | 2018–2021 |
| Clubs1: | Aris Thessaloniki |
| Caps1: | 15 |
| Goals1: | 1 |
| Years2: | 2021– |
| Clubs2: | Olympiacos B |
| Caps2: | 59 |
| Goals2: | 2 |
| Years3: | 2022– |
| Clubs3: | Olympiacos |
| Caps3: | 2 |
| Goals3: | 0 |
| Years4: | 2022 |
| Clubs4: | → PAS Giannina (loan) |
| Caps4: | 8 |
| Goals4: | 0 |
| Nationalyears1: | 2020 |
| Nationalteam1: | Greece U21 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Pcupdate: | 20 April 2024 |
| Ntupdate: | 13 October 2020 |
Petros Bagalianis (Greek, Modern (1453-);: Πέτρος Μπαγκαλιάνης; born 6 February 2001) is a Greek professional footballer who plays as a centre-back for Olympiacos B.
In summer 2022 he moved on loan to PAS Giannina, the main club in the city of Ioannina.[1] On 12 January 2023 Bagalianis returned to Olympiacos B.[2]
Olympiacos