2018–19 Ekstraklasa (men's handball)
The 2018–19 Ekstraklasa was the 63rd season of the Ekstraklasa, Polish's top-tier handball league. A total of fourteen teams contested this season's league, which began on 31 August 2018 and concluded in May 2019.
PGE Vive Kielce were the defending champions.
Format
During the licensing process, work was underway to change the formula of the competition. Finally, the division into two groups was dropped and after the main round the teams will be divided into two groups: the first eight will create the quarter-final pairs, while the remaining six teams will play the match-revenge round for the Ekstraklasa.Teams
The following 14 clubs compete in the Ekstraklasa during the 2018–19 season.| Team | City | Arena | Capacity |
| Arka Gdynia | Gdynia | Gdynia Sports Arena | 5,500 |
| Energa MKS Kalisz | Kalisz | Arena Kalisz | 3,164 |
| Gwardia Opole | Opole | Stegu Arena | 3,378 |
| KS Azoty-Puławy | Puławy | Globus Hall | 4,119 |
| MMTS Kwidzyn | Kwidzyn | KWS KCSiR | 1,504 |
| NMC Górnik Zabrze | Zabrze | HWS Pogoń | 1,777 |
| PGE Vive Kielce | Kielce | Hala Legionów | 4,200 |
| Piotrkowianin Piotrków Trybunalski | Piotrków T. | Hala Relax | 1,800 |
| Pogoń Szczecin | Szczecin | Azoty Arena | 5,403 |
| SPR Chrobry Głogów | Głogów | HWS im. Ryszarda Matuszaka | 2,500 |
| SPR Stal Mielec | Mielec | Hala SW MOSiR | 2,200 |
| Wisła Płock | Płock | Orlen Arena | 5,492 |
| Wybrzeże Gdańsk | Gdańsk | HWS Gdańsk | 1,700 |
| Zagłębie Lubin | Lubin | Hala RCS | 3,714 |