The asymmetric unit of the title complex, [Cu(2)(C(9)H(4)O(6))(C(10)H(8)N(2))(4)](C(9)H(4)O(6))·C(10)H(8)N(2)·13H(2)O, comprises two formula units. The two Cu(II) centres are bridged by a 5-carb-oxy-benzene-1,3-dicarboxyl-ate (Hbtc) ligand. Each of the metal centres is bonded to four N atoms of two bidentate 2,2'-bipyridine ligands (bpy) and one O atom of the Hbtc ligand in a highly distorted square-pyramidal geometry. The secondary structure is stabilized by a variety of O-H⋯O hydrogen bonds and π-π stacking inter-actions connecting the complex cations, Hbtc anions, bpy and water mol-ecules of crystallization. Three water molecules are disordered over two positions, with site occupancy factors of ca 0.8 and 0.2.