Trigonopterus bornensis is a species of flightless weevil in the genus Trigonopterus from Indonesia.
The specific name is derived from that of the island of Borneo.
Individuals measure 2.35–2.81 mm in length. General coloration is a dark rust-color, with a black pronotum and lightly rust-colored antennae.
The species is found around elevations of 20–30 metres (66–98 ft) in Tanjung Redeb in the Indonesian province of East Kalimantan.
T. bornensis is part of the T. bornensis species group.