Gradinja or Gradihna was the ruler of Duklja, from either 1131 to 1142 or 1135 to 1146. Gradinja is one of many persons mentioned only in the Chronicle of the Priest of Duklja (CPD), not found in Byzantine sources as the other Serbian rulers and royalty. Gradinja was the son of Dukljan prince Branislav, and the brother of Grubeša, the former ruler.