Sivasagar {Pron: ˈsɪvəˌsʌgə(r) or ˈʃɪvəˌsʌgə(r)} ( Xiwôxagôr) previously spelled Sibsagar ("the ocean of Lord Shiva"), is a town in Upper Assam, about north east of Guwahati. It is the district headquarters of the Sivasagar district.