Introduction: Serological surveys are important to assess the health status of wild animals. In this study, antibodies against Leptospira spp, causal agents of leptospirosis, were detected in free-living marsupials in the State of Pará, Brazil. Methods: Nineteen blood samples collected from marsupials in the municipalities of Peixe-Boi, Viseu, and Castanhal were subjected to microscopic agglutination tests. Results: In total, 36.8% (7/19) of samples were positive, and two exhibited coagglutination. The most frequent serovars were Icterohaemorrhagiae (60%; 3/5), Panama (20%; 1/5), and Nupezo (20%; 1/5). Conclusions: Anti-Leptospira spp antibodies currently circulate in free-living marsupials in Northeastern Pará.
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