Chromium(II) iodide is the inorganic compound with the formula CrI<sub>2</sub>. It is a red-brown or black solid. The compound is made by thermal decomposition of chromium(III) iodide. Like many metal diiodides, CrI<sub>2</sub> adopts the "cadmium iodide structure" motif, i.e., it features sheets of octahedral Cr(II) centers interconnected by bridging iodide ligands. Reflecting the effects of its d<sup>4</sup> configuration, chromium's coordination sphere is highly distorted.
Treatment of chromium powder with concentrated hydroiodic acid gives a blue hydrated chromium(II) iodide, which can be converted to related acetonitrile complexes.