Experimental measurements of high resolution emission spectra of neutral atomic iodine (I I) have been extended to cover the mid-infrared spectral regions (1800–6000 cm⁻¹) using Fourier transform spec- troscopy. A total of 354 spectral lines are reported here in the above spectral range. While the region between 3000 and 6000 cm⁻¹ were recorded using a conventional quartz Electrodeless Discharge lamps (EDL), spectra in the region 1800–3000 cm⁻¹ were detected using specially prepared EDLs with a CaF₂ window. Hyperfine structure analysis has been carried out on 224 spectral lines, of which 176 are re-ported for the first time. The magnetic dipole constant ( A ) and electric quadrupole constant (B) have been derived for 97 energy levels.