Multiphoton ionization and fragmentation of the hydrogen iodide molecule have been examined at 355 and 532 nm and optical field intensities of 10(11)-5x10(12) W cm(-2) by photoelectron spectroscopy and time-of-flight mass spectrometry. At 532 nm, scission of the H-I bond is favored over direct photoionization of the molecule. Three and four photon ionization of HI at 355 nm (h omega approximate to 3.5 eV), however, reveals clear vibrational progressions associated with the HI+ (2) Pi(3/2) and (2) Pi(1/2) ion product states. Analysis of these spectra yields vibrational frequencies for the (2) Pi(3/2) and (2) Pi(1/2) states that agree to better than 8% with those determined by Bowering et at. [Chem. Phys. Lett. 189, 467 (1992)] from single photon ionization experiments. Above threshold ionization (ATI) of both HI and atomic iodine are also observed.