| Competition: | Liga |
| Season: | 1999–2000 |
| Winners: | Polonia Warsaw (2nd title) |
| Relegated: | ŁKS Łódź Lech Poznań |
| League Topscorer: | Adam Kompała (19 goals) |
| Matches: | 239 |
| Total Goals: | 671 |
| Average Attendance: | 4,622 11.2%[1] |
| Prevseason: | 1998–99 |
| Nextseason: | 2000–01 |
Statistics of Ekstraklasa for the 1999–2000 season.
A total of 16 teams competed in the 1999–2000 season. Polonia Warsaw won the championship.
| Rank | Player | Club | Goals[2] |
|---|---|---|---|
| 1 |  Adam Kompała | Górnik Zabrze | 19 |
| 2 | Tomasz Frankowski | Wisła Kraków | 17 |
| 3 | Sylwester Czereszewski | Legia Warsaw | 16 |
| 4 | Krzysztof Bizacki | Ruch Chorzów | 14 |
| 5 | Mariusz Nosal | Petrochemia Płock | 13 |
| 6 | Emmanuel Olisadebe | Polonia Warsaw | 12 |
| Maciej Żurawski | Lech Poznań / Wisła Kraków | 12 | |
| 8 | Paweł Kryszałowicz | Amica Wronki | 11 |
| Piotr Włodarczyk | Ruch Chorzów | 11 | |
| 10 | Piotr Gierczak | Górnik Zabrze | 10 |
| Rafał Pawlak | Widzew Łódź | 10 | |
| Łukasz Sosin | Odra Wodzisław | 10 |