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In the title compound, 2C8H7N3·C8H6O4·2H2O, the pyridine and pyrazole rings are approximately coplanar, the dihedral angle between them being 4.69 (9)°. The asymmetric unit consists of half of the terephthalic acid (an inversion centre generates the other half of the molecule), one 4-(1H-pyrazol-3-yl)pyridine (4pp) molecule and one water molecule. In the crystal, two 4pp and one terephthalic acid molecules form a linear three-molecule unit as a result of O—H...N hydrogen bonds. These units are further assembled into a three-dimensional network by two types of hydrogen bonds, viz. O—H...O and N—H...O.