Mössbauer spectra of CoFe2O4 show that this spinel is not completely inverse and that the degree of inversion depends on the heat treatment of the material. The magnetic moments of the slowly cooled and the quenched material are 3.4 and 3.9 μB per unit chemical formula, respectively, and the Néel temperatures are 798°K and 792°K, respectively. From the width and the shape of the absorption lines of the Mössbauer spectra several magnetic hyperfine fields have been identified with different B sites and the temperature dependences of these fields have been determined. The different hyperfine fields have been attributed to 57Fe nuclei in B sites with different ratios of iron and cobalt ions in the six nearest‐neighbor A sites.