The crystal structure of CsV(MoO4)2 was determined from single-crystal X-ray diffraction data. It crystallizes in the trigonal space group P3m1 (No. 164) with a = 5.662(3), c = 7.976(2)Å, Z = 1. The structure contains layers of vanadium molybdate with the cesium cations between the layers. Each layer is built up from corner-sharing VO6 octahedra and MoO4 tetrahedra. The structural relationship between the title compound, KAl(SO4)2, KV(SO4)2, and a high-temperature form of Zr(MoO4)2 is discussed.