What's the biggest rivalry in Poland right now?
By default it's still Kraków (Cracovia & Wisła), but given that they're not in the same league currently right now as in 2023/24 I'll go for:
1.
Silesia (Górnik Zabrze & Ruch Chorzów) -
Ekstraklasa
Two historically very successful clubs together in the top flight for the first time in years, Ruch fighting a losing battle against relegation and their recently more successful local rivals Górnik delivered a few nails to that coffin in the derbies this season.
2.
Łódź (ŁKS & Widzew) -
Ekstraklasa
Both teams have over the last decade went through the hell of bankruptcy and 4th tier amateur football, now rejoined for the first time in a long while at the highest level.
3.
Trójmiasto (Arka Gdynia & Lechia Gdańsk) -
I Liga
The top two teams in the second-tier I Liga, have been separated for a few years and now unusually successful together as both are likely to go up and get to fight for the glory of that league title head-to-head.
Lechia vs. Arka still coming up May 18-19
4.
Rzeszów (Resovia & Stal) -
I Liga
Both have decades of agony behind and have now enjoyed 2nd league football together for a couple of years, really reclaiming their place among the big derbies in the calendar rather than just the most underrated one. They're also sharing the same somewhat rustic stadium and the fans of the hosting team get the main stand which adds to the nostalgic derby atmosphere.
5.
Poznań (Lech & Warta) -
Ekstraklasa
Lech Poznań has no reason to take Warta all that seriously, it's not a real rivalry and there's no particular fierceness, but nevertheless they're now both in the highest league and actually form the most elite derby in Poland when it comes to success on the field right now.