Ur-du-kuga (fl. c. 1755—1751 BCE by the short chronology) was the 13th king of the Dynasty of Isin and reigned for 4 years according to the SKL,[i 47] 3 years according to the Ur-Isin kinglist.[i 48][1] He was the third in a sequence of short reigning monarchs whose filiation was unknown and whose power extended over a small region encompassing little more than the city of Isin and its neighbor Nippur. He was probably a contemporary of Warad-Sîn of Larsa and Apil-Sîn of Babylon.