Mittendorf's striped grass mouse is a small species growing to a head-and-body length of about 92 mm (3.6 in).

The tail is nearly as long as the body-length and is bicoloured, black above and pale below, well-clad with hairs in its central section.

[3] This grass mouse is known only from Mount Oku in Cameroon, where it is found in the montane grassland above the forest belt, at an altitude of around 2,200 m (7,200 ft).

[3] Attempts to find the mouse on nearby mountains in Nigeria with similar habitats were unsuccessful.

It may be affected in its upland pasture home by the grazing of livestock and possibly by climate change, but no major threats have been identified, so the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".