In the title mononuclear complex, [MnCl(2)(C(18)H(13)N(3)O)(CH(4)O)], the Mn(II) ion assumes a distorted octa-hedral geometry. There is a π-π stacking inter-action between the phenanthroline ligand and the pyridine ring of a neighboring complex [centroid-to-centroid distance 3.5518 (13) Å]. The crystal structure also contains weak inter-molecular O-H⋯Cl hydrogen bonds that link neighboring complex mol-ecules into a one-dimensional chain along the b axis.