Using magnetic and scintillation spectrometers the energies of the radiations from Co57 and Co58 have been evaluated. Several gamma rays not previously reported have been observed. Co57 decays mainly by K capture but also to a slight extent by positron emission with an upper energy limit of about 300 kev, followed by gamma rays with energies 14.6, 29, 99.8, 122.8, 137.4, and 700 kev. Co58 decays by K capture and with positron emission of upper energy 485+/-10 kev. Gamma rays with energies of 814 and 500 and possibly 1300 kev accompany the decay.