Józef Konstanty Olszyna-Wilczynski ['juz?f ?l'??navil?t????ski] (listen) (27 November 1890 – 22 September 1939) was a Polish general and one of the high-ranking commanders of the Polish Army.
A veteran of World War I, the Polish-Ukrainian War and the Polish-Soviet War, he was executed by the Soviets during the Invasion of Poland of 1939.