Dudu was a 21st-century BC king of Akkad, who reigned for 21 years according to the Sumerian king list, although he is poorly attested archaeologically.
He is depicted as becoming king during the time of relative anarchy that had followed the death of Shar-Kali-Sharri. The king list mentions four other figures who had been competing for the throne during a three-year period after Sharkalisharri's death. There are no other surviving records referencing any of these competitors, but a few artifacts with inscriptions confirming Dudu's rule over a rump Akkadian state that may have included little more than the capital, Akkad itself. He also seems to have campaigned against former Akkadian subjects to the south, including Girsu, Umma and Elam. Unlike preceding Akkadian kings, there are no certain "year names" known from this time, thus it is unlikely that Dudu could have actually reigned so long. The inroads of the Gutians seem to have caused a fairly rapid collapse of Akkadian power during this period of instability, and it has even been suggested that one of the four named rivals for the throne, Ilulu, was himself a Gutian ruler.
Dudu was succeeded by his son Shu-turul per the king list.