In the title compound, [Co(C21H15O3)3], the CoIII ion is coordinated in a slightly distorted octahedral environment by three phenolate O and three benzoyl O atoms from three monoanionic bidentate 2,6-dibenzoyl-4-methylphenolate ligands. The dihedral angles between the mean planes of the central phenolate rings and the peripheral phenyl rings are 46.62 (10)/87.06 (9), 60.44 (8)/23.13 (8) and 46.49 (6)/65.29 (6)°. The crystal packing is stabilized by weak intermolecular C—H⋯O interactions. Molecules are further linked by two π–π [centroid–centroid distances = 3.8612 (14) and 3.9479 (14) Å] and four C—H⋯π interactions, forming a three-dimensional network.