Józef Ondrusz (18 March 1918 – 27 May 1996) was a Polish Czech teacher, writer and folklorist.

Ondrusz was born in the village of Darków (now Lázně Darkov part of Karviná) to a coal miner.

He earned a doctorate in 1972 for his thesis Proza ludowa Śląska Cieszyńskiego 1845-1970 (Folk Prose of Cieszyn Silesia 1845-1970).

He eventually published traditional folk fables, proverbs and stories, often literally adapting them.

[3] Józef Ondrusz died in Lázně Darkov and is buried at the Lutheran cemetery in the nearby municipality of Stonava.