Czesław Znamierowski (1888–1967) was a Polish philosopher, jurist and sociologist. He was Professor of Jurisprudence at the University of Poznań and chaired its Department of Legal Theory and Philosophy of Law. Znamierowski is noted in Polish law for his contributions to social sciences (social ontology) and jurisprudence, particularly the concept of legal system which is similar to H.L.A. Hart's ideas, but was published almost forty years before Hart's The Concept of Law.