Two new Mn(II) complexes [Mn(Hmbhce)2(o-phen)] (1) and [Mn(Hmbhce)2(bpy)] (2) based on N′-(2-methoxybenzoyl)hydrazine carbodithioic acid ethyl ester (H2mbhce) have been synthesized by reacting Mn(OAc)2·4H2O with H2mbhce in the presence of o-phen/bpy. The complexes have been characterized by elemental analyses, magnetic susceptibility measurement, IR, UV–Vis and single crystal X-ray data. Both complexes [Mn(Hmbhce)2(o-phen)] and [Mn(Hmbhce)2(bpy)] crystallize in monoclinic system with space group P 21/c and P 21/n, respectively. The single crystal X-ray structures of 1 and 2 show that the Mn(II) center is bonded with two (Hmbhce)− through carbonyl oxygen and deprotonated hydrazinic nitrogen, plus two nitrogen atoms from one o-phen/bpy co-ligand. The crystal structures of complexes 1 and 2 are stabilized by weak intramolecular N–H···O hydrogen bonding and C–H···π interactions giving supramolecular architectures.