Six solvent-free structures of di- and trihaloanilinium halides are presented. All involve clearly defined hydrophilic regions built up from classical hydrogen bonding systems. The 2,4-dibromo-, 2,6- dichloro-, 2,4,6-trichloro- and 2,4,6-tribromoanilinium derivatives form ribbon structures involving annelated R 2 4 (8) rings with NH 2 donors (two hydrogens from the positively charged NH 3 groups) and halide acceptors. The 2,5-dibromo- and 2,4,5-trichloro derivatives form layers with two types of ring, R 2 4 (8) and R 4 8 (16). All structures also involve other secondary interactions (C-H. . . X hydrogen bonds and/or X. . . X contacts, X = halogen), some of which link the ribbons or layers into a second or third dimension. The shortest X. . . X contacts generally involve the anions. In the 2,4-dibromo, 2,4,6-trichloro and tribromo derivatives, somewhat more extensive halogen aggregates (triangles, angled X 3 or X 4 chains) are formed between neutral halogens. In two appendices, the packing patterns of (I) the disordered structure 3,4,5-trichloroanilinium chloride and (II) the known structures of unsubstituted anilinium halides are briefly presented.