In the title compound, [Zn(C(11)H(8)N(3)O(2)S)(2)(H(2)O)(4)], the Zn(II) ion lies on an inversion centre and is coordinated by four water mol-ecules and two N atoms from two 2-[4-(4-pyrid-yl)pyrimidin-2-ylsulfan-yl]acetate (L) ligands in a distorted octa-hedral geometry. In L, the pyridine and pyrimidine rings are twisted at an angle of 11.2 (1)°. The coordinated water mol-ecules and the acetate groups are involved in the formation of a three-dimensional hydrogen-bonded network, which consolidates the crystal packing.