In the title compound, [ Mn-2( C8H4O7S)(2)( C10H8N2)(2)( H2O)(2)], pairs of hexacoordinated manganese( II) centres are bridged by 2- sulfonatoterephthalate( 2-) anions to form cyclic centrosymmetric dimers, which are linked into sheets by O - H center dot center dot center dot O hydrogen bonds.