Władysław Walentynowicz (born August 24, 1902, in Jaransk, Russia, died March 25, 1999, in Sopot, Poland) was a Polish pianist, composer, educator, and music activist. He was the son of Ignacy, a factory director, and Helena. Walentynowicz completed his music education at the Music Conservatory in Warsaw, studying piano under Antoni Dobkiewicz and Józef Turczyński, and composition under Kazimierz Sikorski.

Before World War II, Walentynowicz performed as both an accompanist and soloist on national stages, including the Warsaw Philharmonic and Polish Radio. He co-founded the Warsaw music school "Kolegium Muzyczne," which he led until 1939. During the German occupation, he played in Warsaw venues and gave private lessons. After the Warsaw Uprising, he was deported to a labor camp in Burgweide and later worked in a linen factory in Michelsdorf.

Returning to Warsaw in 1945, he worked at Polish Radio and was instrumental in organizing music education on the Gdańsk Coast. He founded the Gdańsk Music Institute in Sopot, which later became the State Secondary and Lower Music Schools. From 1950, he taught at the State Higher School of Music in Sopot, later in Gdańsk, and served as its rector during a critical period. He was dean of the Instrumental Department from 1952 to 1972 and continued teaching until 1979.

Walentynowicz was a founding member and long-time president of the Gdańsk branch of the Association of Polish Musicians and a member of the Polish Composers' Union. He composed numerous piano, vocal, and instrumental works. He was married to Maria Honorata Biernacka and had three children, including Marek, an oboist. Walentynowicz was buried in the Catholic cemetery in Sopot.

He was awarded the Medal of the 10th Anniversary of People's Poland in 1955. His compositions include the "Trio for Reeds" for oboe, clarinet, and bassoon, highlighting his contribution to chamber music.