The title compound, [Fe(C(9)H(10)BN(6))(2)], is a polymorph of a compound reported previously [Oliver et al. (1980 ▶). Inorg. Chem.19, 165-168]. In the previous report, the compound crystallized in the monoclinic space group P2(1)/c (Z = 4), whereas the crystal symmetry of the compound reported here is tetra-gonal (P4(2)/ncm, Z = 4). The mol-ecular structure is comprised of two hydro-tris-(1-pyrazol-yl)borate ligands (Tp(-)) and a central Fe(II) ion, which is coordinated by six pyrazole N atoms from two two Tp(-) ligands, yielding a distorted bipyramidal FeN(6) geometry. The complete molecule exhibits symmetry 2/m.