The density‐of‐states effective masses for the heavy‐hole, light‐hole, and split‐off valence bands of GaAs have been calculated as a function of energy for each band. The calculations are based on a fullk⋅ptheory with the most recent values used for the matrix elements. Provision has been made for the effect of the split‐off energy on the matrix elements of the split‐off band. The results show important nonparabolicities which should be taken into account in modeling the valence band, and rational polynomial fits have been made for ease of computation.