The article aims to identify problems with the logistics of supplying dairy plants with milk. The methods used in the article include an analysis of literature and diagnostic surveys. Focused interviews were conducted with chairmen of cooperatives and directors for purchase and transport of milk in six dairy plants in various parts of Poland. Based on the research conducted, the following problem areas related to the logistics of supplying dairy plants with milk were identified: the number and size of the suppliers, seasonal character of milk production, continuous collection of milk, the suppliers’ location and problems with the organisation of transport.