Labashi-Marduk (Babylonian cuneiform: Lâbâši-Marduk or Lā-bâš-Marduk, meaning "O Marduk, may I not come to shame") was the fifth and penultimate king of the Neo-Babylonian Empire, ruling in 556 BC. He was the son and successor of Neriglissar. Though classical authors such as Berossus wrote that Labashi-Marduk was just a child when he became king, Babylonian documents indicate that he had been in charge of his own affairs before his rise to the throne, suggesting he was an adult, though possibly still relatively young.