Euphemia of Racibórz was a 14th-century Polish princess from the House of Piast who became a Dominican nun. Born in Racibórz around 1299, she entered the monastery of the Holy Spirit in her home city in 1313. Throughout her religious career, she served as prioress on two separate occasions. She was noted for her administrative skill, managing and expanding the monastery's land holdings and assets through various acquisitions and donations during her lifetime.