Hirshfeld surface analysis is a very useful method for examining the intermolecular interactions that form the lattice within a crystal. The percentage of intermolecular interactions can be determined with the two- dimensional fingerprint graphics obtained. In this work, four dimeric bismuth(III) halide-thioamide complexes {[BiCl3(μ2-S-PYT)(PYT)]2} (1), {[BiBr2(μ2-Br)(tHPMT)2.CH3CN]2} (2), {[BiBr2(μ2- Br)(PYT)2]2.CH3CN} (3) and {[BiI2(μ2-I)(MBZIM)2]2} (4), previously synthesized and characterized, were selected (PYT: 2-mercaptopyridine, tHPMT: 2-mercapto-3,4,5,6-tetrahydro-pyrimidine and MBZIM: 2- mercaptobenzimidazole). To determine of intermolecular interactions of complexes 1-4 Crystal Explorer ver. 21.5 used. According to the obtained hirshfeld surfaces, it was determined that the interactions that gave the most contribution to the dimeric bismuth(III) halide complexes 1-4 were X...H/H...X (X: Cl, Br or I) and H...H contacts.