Sin-Muballit was the father of Hammurabi.

He was the fifth king of the first dynasty of Babylonia, reigning c. 1748 to 1729 BCE.

His son Hammurabi greatly expanded the Babylonian kingdom.

Sin-Muballit succeeded Apil-Sin.

No inscriptions for either king are known.

In Sin-Muballit's 13th year, he repelled the army of Ur, which had invaded the territory of Babylon.

In the 17th year of his reign, Sin-Muballit took possession of the city of Isin and his power grew steadily over time as evidenced by his building and fortifying a number of fortresses.