UPd2Ga3 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. U is bonded in a distorted hexagonal planar geometry to six equivalent Pd atoms. All U–Pd bond lengths are 3.08 Å. Pd is bonded in a 12-coordinate geometry to three equivalent U and six equivalent Ga atoms. All Pd–Ga bond lengths are 2.65 Å. Ga is bonded in a 12-coordinate geometry to four equivalent Pd atoms.