Zbigniew Lengren (2 February 1919 in Tula – 1 October 2003 in Warsaw) was a Polish cartoonist, caricaturist, and illustrator, of Swedish descent. He was awarded the "Order of Smile" amongst other, numerous awards. His most famous creation is Professor Filutek, who appeared once a week on the last page of Przekrój magazine, together with his dog Filuś, for over 50 years, a record run in Polish comics. Lengren was also a writer, especially of poems for children.

In 1947, whilst a Fine Arts student of the Nicolaus Copernicus University, he won a competition to design the Super Ex Libris for the University Library.^[2] The design is still in use today.