StadiumStadion Narwi
| Current capacity of the stadium |
| Standing | 11 400 |
| Seats | 7 900 |
| Tribune | 7 500 |
| Seats for sponsors | 100 |
| Fans attended |
| 1. 8. 2026 | Narew Ostrołęka-Słubice | 3 488 |
| 27. 7. 2026 | Narew Ostrołęka-Podpaskudy | 3 531 |
| 23. 7. 2026 | Narew Ostrołęka-Olsztynek | 3 498 |
| 18. 7. 2026 | Narew Ostrołęka-Milicz | 3 560 |
| 11. 7. 2026 | Narew Ostrołęka-GKS KATOWICE Hooligans™ | 3 665 |
| 6. 7. 2026 | Narew Ostrołęka-Miastko | 3 663 |
| 4. 7. 2026 | Narew Ostrołęka-Żukowo | 3 493 |
| 29. 6. 2026 | Narew Ostrołęka-Żary | 3 844 |
| 25. 6. 2026 | Narew Ostrołęka-Łęknica | 4 345 |