Jadwiga of Kalisz (Polish: Jadwiga Boleslawówna; 1266 – 10 December 1339) was a Queen of Poland by marriage to Wladyslaw I the Elbow-high.
She was the mother of the last Piast King of Poland, Casimir III.
She was the second of three daughters born to Boleslaw the Pious and Saint Yolanda of Hungary.
In 1293, Jadwiga married Wladyslaw I the Elbow-high.