The Wemba-Wemba are an Indigenous Australian group in north-Western Victoria and south-western New South Wales, Australia, including in the Mallee and the Riverina regions. They are also known as the Wamba-wamba.
Before European settlement in the nineteenth century, the Wemba-Wemba occupied the area around Swan Hill, Victoria, Dunolly and Creswick. Norman Tindale recorded the tribe as on the Loddon River from Kerang, Victoria north to Swan Hill; on the Avoca River south to near Quambatook; northeastward to Booroorban, New South Wales and Moulamein; near Barham; at Lake Boga and Boort, Victoria.
Two German Moravian missionaries, Reverend A.F.C. Täger and Reverend F.W. Spieseke, established Lake Boga mission in 1851. The mission closed in 1856 due to lack of converts, disputes with local authorities and hostilities from local landholders. The Moravian Church established a subsequent mission site in Wergaia territory near Lake Hindmarsh in 1856 (see Ebenezer Mission).