Znak (Polish: Sign, Symbol) was an association of lay Catholics in Poland, active between 1956 and 1976.
It was created as one of several smaller groups that split from the communist-controlled association PAX of Bolesław Piasecki in 1956.
It was granted with several seats in the Polish Sejm and was intended as a link between the Catholic Church and the state.
It was composed of the members of Klub Inteligencji Katolickiej (Club of Catholic Intelligentsia) and journalists of the newspaper Tygodnik Powszechny.
[1] A remainder of the group existed until 1980 when it was renamed to Polski Związek Katolicko-Społeczny, which like the Znak had representatives in the Sejm and continues today as a Catholic charity organisation that was notable for its opposition to martial law in Poland.