In the title compound, [Co(C(5)H(7)O(2))(2)(C(12)H(8)N(2))], the Co(II) cation lies on a twofold rotation axis and is coordinated by four O atoms from two acetyl-acetonate (acac) ligands and two N atoms from a 1,10-phenanthroline (phen) ligand in a slightly distorted octa-hedral environment, with Co-O bond lengths of 2.0565 (11) and 2.0641 (11) Å and Co-N bond lengths of 2.1630 (12) Å. In the crystal, there are no significant hydrogen-bonding or π-π inter-actions.