Seniorate Province, also known as the Senioral Province, Duchy of Kraków, Duchy of Cracow, Principality of Cracow, Principality of Kraków, is the superior among the five provinces established in 1138 according to the Testament of Bolesław III Krzywousty.

It exists during the period of fragmentation of Poland until 1320, centered at Kraków in Lesser Poland.

The Seniorate Province is supposed to be ruled by the rotating head of the royal Piast dynasty, a principality that he holds as overlord (Senior Prince or High duke, princeps) of the other Polish dukes.