Siyabuswa is a town (also informally defined as a township) in the countryside of the South African province of Mpumalanga (a region formerly called Eastern Transvaal). During the apartheid era, Siyabuswa was the capital of the KwaNdebele Bantustan. It served as a capital from 1981 to 1986 when KwaMhlanga replaced it. Most of its inhabitants (population in 2011: 36 882) are members of the Ndebele ethnic group. The town is about 20 kilometers southwest of the Marble Hall airport.