StadiumKaraiskakis Stadium
| Current capacity of the stadium |
| Standing | 39 700 |
| Seats | 24 800 |
| Tribune | 14 900 |
| Seats for sponsors | 500 |
| Fans attended |
| 22. 8. 2025 | Olympiacos Pireus F.C.-FC Erfurt | 15 528 |
| 15. 8. 2025 | Olympiacos Pireus F.C.-Real Jaén CF | 16 485 |
| 8. 8. 2025 | Olympiacos Pireus F.C.-FC Orario | 14 581 |
| 1. 8. 2025 | Olympiacos Pireus F.C.-STS DURANGA Psojedy | 13 280 |
| 25. 7. 2025 | Olympiacos Pireus F.C.-Ruprechtov | 12 717 |
| 11. 7. 2025 | Olympiacos Pireus F.C.-CHAOS Pyla™ | 12 554 |
| 8. 7. 2025 | Olympiacos Pireus F.C.-1. FC VYŠNÁ SITNICA | 9 316 |
| 4. 7. 2025 | Olympiacos Pireus F.C.-FC Baník St. Albert | 9 258 |
| 4. 7. 2025 | Olympiacos Pireus F.C.-FC Erfurt | 8 415 |