The Museum and Institute of Zoology of the Polish Academy of Sciences (MIZ PAS) hosts the largest zoological collection in Poland. The institution provides access to over 7,000,000 specimens, including 50,000 types, that have been collected since the 19th century in ecosystems around the World (e.g., Brazil, Ecuador, Egypt, Poland, Peru, Siberia, Korea, Vietnam). Particularly diverse holdings concern groups such as birds, mollusks, and arachnids due to the activity of several prominent Polish specialists such as Benedykt Dybowski, Jan Sztolcman, Władysław Taczanowski, Szymon Tenenbaum, and many others. The present dataset contains information acquired in recent digitization efforts and represents the taxonomic and geographic diversity of MIZ PAS collections.