Ur-Baba or Ur-Bau ( <small></small> or <small></small>, servant of the goddess Bau; died 2144 BC) was ensi of Lagash from 2093 BC â 2080 BC (short chronology) or 2157 BC â 2144 BC (middle chronology), roughly contemporaneous with the last king of Akkad, Shu-turul. In one of his inscriptions, he refers to himself as a child of the god Ninagal ().
According to inscriptions of Ur-Baba, during his reign, Lagash enjoyed prosperity and independence from the Akkadians. His daughter Ninalla married Gudea, who succeeded him as ensi.