| Isidoros Koutsidis | |
| Fullname: | Isidoros Chrysovalantis Koutsidis |
| Birth Date: | 23 December 2004 |
| Birth Place: | Drama, Greece |
| Height: | 1.91 m |
| Currentclub: | Olympiacos |
| Clubnumber: | 67 |
| Position: | Centre-back |
| Youthyears1: | 2016–2020 |
| Youthclubs1: | PAOK |
| Years1: | 2020–2021 |
| Clubs1: | Panserraikos |
| Caps1: | 7 |
| Goals1: | 0 |
| Years2: | 2021–2024 |
| Clubs2: | Olympiacos B |
| Caps2: | 32 |
| Goals2: | 0 |
| Years3: | 2024– |
| Clubs3: | Olympiacos |
| Caps3: | 0 |
| Goals3: | 0 |
| Nationalyears1: | 2024– |
| Nationalteam1: | Greece U21 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Pcupdate: | 15 April 2024 |
| Ntupdate: | 19 November 2024 |
Isidoros Koutsidis (el|Ισίδωρος Κουτσίδης; born 23 December 2004) is a Greek professional footballer who plays as a centre-back for Super League club Olympiacos.