Marian Walentynowicz (born 20 January 1896 in St-Petersburg, Russian Empire, died 26 August 1967 in Warsaw, Poland) was a Polish graphic artist, architect, teacher, writer and a precursor of the Comic book in Poland.
He is preobably best known for his collaboration, as illustrator, with Kornel Makuszynski in their creation of the Koziolek Matolek very popular classic children's stories about a billy goat.