In the title compound, [Co(C(17)H(14)O(6))(C(12)H(8)N(2))(H(2)O)](n), the Co(II) atom is coordinated by a monodentate 4,4'-(propane-1,3-diyldi-oxy)dibenzoate (cpp) dianion, a water mol-ecule and a chelating 1,10-phenanthroline (phen) ligand. A symmetry-generated cpp ligand completes the CoN(2)O(3) trigonal-bipyramidal geometry for the metal ion, with the N atoms occupying both equatorial and ax...