Constance of Greater Poland (also known as of Poznań) (1245/46 – 8 October 1281) is a princess of Greater Poland, a member of the House of Piast, and by marriage a Margravine of Brandenburg-Stendal.
She is the eldest daughter of Przemysl I, Duke of Greater Poland and Poznań, by his wife Elisabeth, daughter of Henry II the Pious, Duke of Wroclaw.
She was probably named after her maternal aunt Constance, second wife of Casimir I, Duke of Kuyavia.