This is the fourth in a series of individual publications on Zambian languages and grammar. The intention of the series is to boost the meagre scholarship and availability of educational materials on Zambian languages, which became particularly in urgent in 1996, following the decision of the Zambian government to revert to the policy of using local languages as media of instruction. This volume provides a grammatical sketch of Tonga, a Bantu language spoken in southern Zambia. It is the mother tongue of some 800,000 people. Chapters cover people and dialects, sound systems and orthography, morphology and syntax.