In the title compound, [Mn(C(7)H(6)NO(4)S)(2)(H(2)O)(4)], the Mn atom, lying on an inversion center, exhibits a distorted octa-hedral coordination by six O atoms, two from carboxyl-ate groups and four from water mol-ecules. The SO(2)NH(2) group is involved in a three dimensional polymeric hydrogen bonding network along with the water mol-ecules. π-Stacking inter-actions parallel to the c axis lead to a separation of 4.0050 (12) Å between the centroids of the benzene rings.