The Polskie Towarzystwo Socjologiczne (PTS) (Polish Sociological Association) is the main professional organization of sociologists in Poland.
Its seat is in Warsaw with regional offices in Białystok, Gdańsk, Katowice, Kraków, Lublin, Łódź, Opole, Poznań, Rzeszów, Szczecin, Toruń, Wrocław, and Zielona Góra.
In 1931, on the first ever national convention of sociologists in Poznań, separate professional organization under the name of Polskie Towarzystwo Socjologiczne (PTS) was created on Znaniecki's initiative.
All sociological university departments and institutes, including the PIS, were closed, their employees transferred to neighbouring disciplines such as philosophy or history.
However, lack of government support also constituted a constant problem for the organizational work of the PTS; e.g., the first post-war national convention did not take place until 1965.
From the third event onwards, the title has been Ogólnopolski Zjazd Socjologiczny ("All-Polish sociological convention"), with the addition of a vaguely defined overarching topic for papers and sessions as stated below.