[2] GKS Bełchatów entered Poland's Klasa A in 1977 under the name of Węgiel Brunatny Bełchatów,[3] and gained promotion to the III liga in the 1981–82 season.

As a consequence, they were moved to the last place in the 2021–22 season standings and their remaining matches being declared 0–3 forfeits for their opponents.

[10] Their biggest rivals are neighbours RKS Radomsko, and as Bełchatów is located in the Łódź Province, they also have rivalries with the two traditional well-established Łódź teams, ŁKS and Widzew.

[10] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.