The State Publishing Institute PIW (Polish: Państwowy Instytut Wydawniczy, PIW) is a Polish publishing house founded in Warsaw by the state in 1946 after the end of World War II.
PIW specializes in literature, history, philosophy and social sciences. One of its more popular literary series published since 1968 (Współczesna Proza) includes award-winning novels in translation by writers such as Umberto Eco, Gabriel Garcia Marquez, Vladimir Nabokov, Isaac Bashevis Singer, Kurt Vonnegut, and Günter Grass. Państwowy Instytut Wydawniczy also publishes a popular series of biographies of famous individuals, as well as various encyclopedic books. At present (2011) its president is Rafał Skąpski.