In the title three-dimensional coordination polymer, [Sr(4-CPOA)(H2O)](n) (where 4-CPOA2- is the 4-carboxylatophenoxyacetate dianion, C9H6O5), each Sr(II) atom displays a bicapped triangular prismatic configuration, defined by five carboxyl and one ether O atom from five different 4-CPOA2- ligands, as well as two water molecules. The Sr(II) atoms are covalently linked by 4-CPOA2- ligands and water molecules, giving rise to a three-dimensional open framework. In previously studied polymers of this type, the 4-CPOA2- ligand shows a variety of binding modes to metal ions, from mono- to pentadentate. In the present Sr(II) complex, a novel hexadentate bridging mode is observed.