The present study is based on oribatid mite material (Acari, Oribatida) collected in October–December 2014 from the vicinity of Lake Tana, Northwest Ethiopia. A list of identified taxa, including 34 species from 29 genera and 25 families, is provided; of these, ten species, seven genera and three families are recorded in Ethiopia for the first time. A new species of the genus Haplozetes (Haplozetidae) is described from the leaf litter of forests with Coffea arabica and Podacarpus gracilor. Haplozetes valbehanae n. sp. is morphologically most similar to H. triungulatus Beck, 1964, but differs by the tridentate rostrum and presence of four pairs of genital setae and dense cerotegumental tubercles in the anterior part of the ventral plate.