Basket Liga Kobiet (BLK), officially known as the Orlen Basket Liga Kobiet (OBLK) due to its sponsorship by Orlen,[1] is a professional women's club basketball league in Poland.

The winning team of the final round are crowned the Polish Champions of that season.

The BLK, which is played under FIBA rules, currently consists of 10 teams (professional basketball's clubs).

Wisła Kraków is the most successful team in the championship with 25 titles, followed by AZS Warsaw, Lotos Gdynia and ŁKS Łódź with fourteen, eleven and nine respectively.

Gdynia holds the longest winning streak with eight titles in a row between 1998 and 2005.