Holmium(III) selenide is an inorganic compound with the chemical formula Ho<sub>2</sub>Se<sub>3</sub>.
Holmium(III) selenide can be obtained from the reaction of holmium and selenium (in the presence of iodine):
It can also be prepared by reacting holmium oxide and hydrogen selenide at high temperature.
Holmium(III) selenide can form orthorhombic AgHoSe<sub>2</sub> in the binary system of silver selenide.