Preliminary results on the ecology of raccoon in Poland are presented. The use of space (by radiotelemetry), diet composition and parasite infections (both by scat analysis) were investigated. The home-range size of the raccoon in western Poland averaged 1 km² in suburban areas (n = 5 individuals), 10 km² in the Warta Mouth National Park wetland area (n = 5), and 60 km² for a single individual studied inhabiting woodlands. Space use patterns in relation to habitat type were also studied. About 44% of the biomass consumed by raccoons were mammals, 41% other vertebrates, 12% invertebrates, 2% plant material and only 1% eggs. Three species and one genus of helminths, e.g. the humans pathogen parasite, Baylisascads procyonis, were identified.