Near-infrared absorption spectra of A2CoX4 (A = Cs, ethyl4N; X = Cl, Br) single crystals and from KBr pellets at low temperature are recorded by the Fourier transform technique. At 2 K a rich fine structure of v1(4A2→4T2) and v2(4A2→4T1) ligand field spectra is detected which can be assigned to low symmetry level splittings due to actual site symmetries superimposed by vibrational fine structure. Comparison of fundamental frequencies obtained from far-infrared spectra allows an assignment of all peaks measured in the vibronic spectra to vibrational modes of the MX4 complex. Zero-phonon bands are identified using the assistance of angular overlap calculations.