The optical properties of an epitaxial indium phosphide (InP) film deposited on an Fe compensated InP (InP:Fe) wafer have been measured at room temperature by ex-situ spectroscopic ellipsometry over a spectral range of 0.038–8.5eV. The complex dielectric function spectra, ε (E)=ε1 (E)+iε2 (E), have been determined by fitting a parametric model to the experimental ellipsometric data. Kramers-Kronig consistent parameterizations have been applied to describe interband transitions and defect-based sub-bandgap absorption in the 0.73–8.5eV spectral range, and both phonon modes and free carrier properties in the 0.038–0.73eV range. Spectra in ε from 0.73–8.5eV shows ten higher energy interband critical point transitions at 1.36, 1.42, 3.14, 3.34, 4.71, 4.97, 5.88, 6.45, 7.88, and 8.22eV. The direct band gap energy of 1.37eV and Urbach energy 46meV are also determined from spectra in ε. A strong optical phonon mode is identified near 305cm−1. Electronic transport properties, carrier concentration (N) and mobility (μ), calculated from Drude model with N=1.9×1018cm−3 and μ=1559cm2/Vs agree well with direct electrical Hall effect measurement values of N=2.2×1018cm−3 and μ=1590cm2/Vs. A parameterization of ε from 0.038 to 8.5eV for the epitaxial InP film is reported.