The article presents detailed description of methods of arrangement and description of archival materials in three community archives from Poland: the Foundation of General Elzbieta Zawacka, the Association "History Tellers from the Lower City in Gdansk", and the Civic Archive in Podkowa Lesna. Information presented in the article are part of a research project entitled "Community archives in Poland: multiple case study" (2016-2019). Research data was collected during field studies, using methods of semi-structured interviews, on-site direct observations, and desk research. The article also provides information about the context of operation of contemporary community archives in Poland, especially the phenomenon of professionalization of community archives and its impact on methods of their archival work. As a key finding, the study stresses the importance of knowing the community archive's context in understanding its archival practices.