High-spin states in ^163,164Ho were investigated by means of in-beam γ-ray spectroscopy techniques using the multidetector array GASP. Excited states in ^163,164Ho were populated predominantly through the incomplete-fusion mechanism in the ¹⁶⁰Gd (¹¹B,αxn) reaction at a beam energy of 61 MeV. Known rotational bands in ¹⁶³Ho have been extended to higher spins and a three-quasiparticle band has been observed in this nucleus. Rotational bands have been identified in ¹⁶⁴Ho and their configurations have been discussed. Empirical Gallagher-Moszkowski (GM) splitting energies were extracted from the π_7/2^-[523]⊗ν_5/2^-[523] and π_7/2^-[523]⊗ν_5/2⁺[642] GM doublets. Alignments, band crossing frequencies, and electromagnetic properties have been analyzed in the framework of the cranking model.