Research project assessing biomes of Namibia, as determined by objective categorisation. The biomes of the whole of Namibia are mapped and descriptionbed, following the objective categorisation method of Rutherford & Westfall (1986). Four biomes occur in Namibia: Savanna, Nama-Karoo, Succulent Karoo and Desert. The border between the latter two, as accepted here, differs from earlier interpretations in including very low winter rainfall areas of southwestern Namibia in the Desert, rather than Succulent Karoo, Biomes. As a consequence previously unrecognised outliers of the Desert Biome are mapped in southern Namibia and adjacent South Africa. Other biome borders in southern Namibia largely correspond to those previously recognised. A large area of edaphic Nama-Karoo Biome occurs in the Etosha Basin of northern Namibia. The previously neglected edaphic effect of sand at biome level is discussed. The definition of the Desert Biome is modified from therophytic dominance to chamaephytic - therophytic codominance.