In the title compound, [MnCl2(C16H15N5)(CH4O)], the manganese(II) cation is six-coordinate, forming a distorted octa-hedral configuration with bis-(1H-benzimidazol-2-yl-methyl)-amine (IDB) serving as a neutral tridentate chelating ligand. Two imine and one amine N atoms from IDB and one Cl anion form the equatorial plane. The two axial positions are occupied by the methanol O atom and the other Cl anion. By a combination of two N-H⋯Cl and one O - H⋯Cl hydrogen bonds, mol-ecules are linked into a three-dimensional network which is strengthened...