The article presents sources for the history of state agriculture in 1946–1982 housed in the State Archives in Olsztyn. Firstly, it provides an outline of the organisational changes of state farms (PGRs) over time, taking into account the competences of individual organizational units. This is followed by the characteristics of the contents of the archives according to the structure presented in the first part. As the detailed analysis was conducted on the organization and legacy of state–level agricultural holdings, the whole was supplemented by a short description of other sources and their creators, which contain information on the functioning of agriculture in the years 1946–1982 and stored in the State Archive in Olsztyn.