In the asymmetric unit of the title compound, [Mn(C(2)O(4))(C(3)H(10)N(2))(2)]Cl·H(2)O, there are two independent Mn(III) complexes, two Cl(-) anions and two uncoordinated water mol-ecules. Each Mn(III) atom is hexa-coordinated by four N atoms from two propane-1,3-diamine ligands and two O atoms from one oxalate ligand, resulting in a slightly distorted octa-hedral MnO(2)N(4) geometry. Mn-O and Mn-N bond lengths are in the ranges 1.969 (2)-2.020 (3) and 2.068 (3)-2.113 (4) Å, respectively. There are weak inter-molecular O-H⋯O, O-H⋯Cl, N-H⋯O and N-H⋯Cl hydrogen bonds with D⋯A distances in the range 2.831 (4)-3.423 (3) Å.