In this study, the permeability of three different 3D woven carbon fiber reinforcements (orthogonal, angle interlock and layer to layer) was studied. For all reinforcements, unsaturated radial in-plane, andaturated through-thickness permeability was obtained at several fiber volume fractions. The effect of cyclic compaction on permeability was also investigated. Orthogonal and layer to layer showed more anisotropy in the plane of flow. Angle interlock and orthogonal anisotropy ratio was approximately constant. The decrease in in-plane permeability with increasing fiber volume content was less than through thickness. The effect of cyclic compaction on permeability was greater for orthogonal and angle interlock reinforcements. Micrographs of infused samples showed significant permanent deformation of z-binder yarns which reduced permeability at high fiber volume content.