I liga

In 1913 and 1914, the football championship of Austrian Galicia took place. At that time it was called the A Class Championship, with four top teams of the province (Cracovia, Wisła Kraków, Pogoń Lwów and Czarni Lwów). Since there were many more football teams in Galicia, the B Class Championship was made for them. Also, in 1921, already in the Second Polish Republic, there were two levels: winners of regional A Classes played in the national championship, while winners of the B Classes (Cracovia II, Pogoń Lwów II, AZS Warszawa and Union Łódź) had their own tournament. For financial reasons, this idea was abandoned after one year.

In the Second Polish Republic, there were regional leagues, or A Classes, which were the second level of Polish football system, behind the Ekstraklasa, which was formed in 1927, see Lower Level Football Leagues in Interwar Poland. Since in the late 1930s only two teams were promoted to the Ekstraklasa, and there were as many as fourteen regional champions, there was a complicated system of playoffs. Firstly, winners of neighbouring A Classes played each other, and in the final stage, four teams competed, with two top sides winning the promotion.

Second-level league was first created for the 1949 season, and was split into northern and southern sections, each comprising 10 teams.[3] First plans to create this league appeared in 1947. On February 14 and 15, 1948, a meeting of officials of Polish Football Association took place in Warsaw. Officials from Gdańsk promoted the creation of the league, but this idea was opposed by the delegates from the most powerful regions of Polish football: Kraków, Łódź, Upper Silesia and Warsaw. On May 30, 1948, however, the second division was officially approved, with 18 teams in one group. On February 19, 1949, Polish Football Association decided to expand the league to 20 teams, divided into northern and southern groups.

First games of the new, second division, took place on March 20, 1949, with the first goal scored by Jozef Kokot of Naprzód Lipiny, in a game between Naprzód and Błękitni Kielce. First winners of the second division were Garbarnia Kraków (northern group) and Górnik Radlin (southern group): both sides were promoted to the Ekstraklasa. To determine a winner of the 1949 season of the second division, Górnik had to play Garbarnia in three extra games (4:2, 0:2 and 4:3). The top scorer of the first season was Mieczyslaw Nowak of Garbarnia, with 24 goals. Relegated were the teams of Ognisko Siedlce and PTC Pabianice (northern group), and Błękitni Kielce and Pafawag Wrocław (southern group).

For the 1951 season the format was changed to four groups, with eight teams in each group.[4]

For the 1973–74 season the 2nd level was changed to comprise two sections, split into north and south.[5]

For the 1989–90 season the league reverted to a single group.[6]

In 2000 the number of teams was limited to 20 sides, then to 18. Champions and vice-champions received automatic promotion, while third place teams competed in playoffs. The bottom four teams were relegated.

From the 2008–09 season, the league was renamed as I liga. The number of teams competing remained at 18. Teams which place 15-18 were automatically relegated to II liga (West or East). The first and second placed teams were promoted to the Ekstraklasa. In 2014 II liga merged into one group and these rules were changed – the three worst-ranked teams are relegated, and the 15th I liga club compete in playoffs with the fourth placed II liga team. In 2018 the relegation playoff was removed. Since the 2019–20 season the top 2 teams are automatically promoted whilst teams placed 3–6 compete in a playoff for the final 3rd spot.

Arka Gdynia

Bruk-Bet Termalica

Chrobry Głogów

GKS Katowice

GKS Tychy

Górnik Łęczna

Lechia Gdańsk

Miedź Legnica

Motor Lublin

Odra

Podbeskidzie

Polonia Warsaw

Resovia

Stal

Wisła Kraków

Wisła Płock

Zagłębie S.

Znicz Pruszków

Location of teams in 2023–24 I liga.

GKS Katowice

GKS Tychy

Zagłębie Sosnowiec

Location of teams in the Katowice urban area in 2023–24 I liga.

Note: Table lists in alphabetical order.

1. ^ Due to Odra's home venue missing a heated pitch, they played their home games at GIEKSA Arena in Bełchatów from 15 November 2023 to 31 March 2024.[7]
2. ^ Due to the renovation of the Resovia Stadium in Rzeszów, Resovia play their home games at the Stadion Miejski Stal.
3. ^ Wisła Płock played the first two home matches at limited capacity of 4,300 due to ongoing construction work. The stadium opened in its full capacity for a matchday 7 fixture against Polonia Warsaw[8].