Trigonopterus ijensis is a species of flightless weevil in the genus Trigonopterus from Indonesia.
Etymology The specific name is derived from that of the type locality.
Description Individuals measure 2.75–3.31 mm in length. General coloration is black, with rust-colored legs and head. The elytra are dark rust-colored, with a black band running transversely across them.
Range The species is found around elevations of on Mount Ijen, in the Indonesian province of East Java.
Phylogeny T. ijensis is part of the T. dimorphus species group.
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