The lesser kudu is a medium-sized bushland antelope found in East Africa. The species is a part of the ungulate genus Tragelaphus, along with several other related species of striped, spiral-horned African bovids, including the related greater kudu, the bongo, bushbuck, common and giant elands, nyala and sitatunga. It was first scientifically described by English zoologist Edward Blyth (1869).

Tragelaphus is a genus of medium-to-large-sized spiral-horned antelopes. It contains several species of bovines, all of which are relatively antelope-like. Species in this genus tend to be large in size and lightly built, and have long necks and considerable sexual dimorphism. Elands, including the common eland, are embedded within this genus, meaning that Taurotragus must be subsumed into Tragelaphus to avoid paraphyly. Alternatively, Taurotragus could be maintained as a separate genus, if the nyala and the lesser kudu are relocated to their own monospecific genera, respectively Nyala and Ammelaphus. Other generic synonyms include Strepsiceros and Boocercus. The name "Tragelaphus" comes from the mythical tragelaph.