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The asymmetric unit of the crystal structure of the title compound, C2H10N22+·Cl2I−·Cl−, contains two ethylenediammonium cations, two [ICl2]− anions and two Cl− anions, of which one cation, one [ICl2]− anion and one Cl− anion have site symmetry 2, with the mid-point of the C—C bond of the cation, the I atom of [ICl2]− anion and the Cl− anion located on the twofold rotation axes. The two independent cations show different conformations, the N—C—C—N torsion angles being 160.1 (2) and −73.1 (4)°. The crystal structure is stabilized by extensive intermolecular N—H...Cl hydrogen bonding.