The tridentate Schiff base ligand of the title complex, [V(C(15)H(12)N(2)O(4))O(C(12)H(8)N(2))]·C(3)H(7)NO, was derived from the condensation of 2-hy-droxy-1-naphthaldehyde and l-asparagine. The central V(IV) atom is six-coordinated by one oxide O atom, two N atoms from 1,10-phenanthroline and one N atom and two O atoms from the Schiff base ligand in a distorted octa-hedral geometry. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds connect mol-ecules into centrosymmetric dimers. The C atoms of the dimethyl-formamide solvent mol-ecule are disordered over two sites with site-occupancy factors of 0.732 (13) and 0.268 (13).