This paper deals with the tonology of Yamba, a previously undescribed West African language spoken in northeastern Cameroons along the Nigerian border. It is classified as an Eastern Grassfields Bantu language belonging to the Benue-Congo group of Niger-Congo languages.The tonology of the language is first discussed from the viewpoint of the overall system of tones and tone melodies. The following chapters deal with the manifestation of this system on individual word classes: nouns, pronouns, adjectives, verbs, adverbs, and auxiliaries. Reduplication is discussed separately in the last chapter because reduplicated words frequently do not have the same set of tone melodies that otherwise belong to their respective word classes.