The title complex, [V(2)(C(8)H(7)O(3))(2)O(4)(C(12)H(8)N(2))(2)], is a centrosymmetric dimer formed by two V(V) complex units bridged by two μ(2)-oxido groups. The V(V) atom is six-coordinated by three oxide O atoms, one O atom from a vanillinate ligand and two N atoms from a 1,10-phenanthroline ligand in a significantly distorted octa-hedral geometry. In the crystal structure, weak inter-molecular C-H⋯O hydrogen bonds connect the mol-ecules into a three-dimensional network.