Euxanthe trajanus, the Trajan's forest queen, is a butterfly in the family Nymphalidae.

Ground-colour of both wings black; the forewing in the above and beneath with a yellow-brown basal spot, a light yellow transverse band across the middle, a curved row of seven submarginal spots, of which the anterior ones are larger, and two or three small white spots before the apex; the hindwing above is bluish white in the middle and has small white dots close to the distal margin; beneath it is black with deep black rays between the veins and narrowly red-brown at the base.

[3] The habitat consists of primary lowland evergreen forests.

The larvae feed on Deinbollia, Phialodiscus and Lovoa species.

This article related to members of the butterfly subfamily Charaxinae is a stub.