Using iron single crystals deformed at 195 and 77 K, the anisotropy of the high‐field susceptibility is measured by a Foner magnetometer in the (101), (121), and (111) plane. In the initial stage of deformation at 195 K, the high‐field susceptibility is determined mainly by edge dislocations which are arranged as extended dislocation layers characterized by long‐range stresses. With increasing deformation mainly screw dislocations are activated arranged in groups exerting long‐range stresses. In the case of deformations at 77 K screw dislocations of the primary and conjugate glide system are activated forming dislocation bundles. The long‐range stress field of these dislocation bundles can be represented by 16 to 18 dislocations.