Total ionization cross-sections (TICS) for the impact of intermediate and high energy electrons on the halogen atoms F, Cl, Br and I as well as the molecules F 2 , Cl 2 , Br 2 and I 2 are calculated from threshold to about 2000eV. The present results obtained from our approach based on complex potential are compared with experimental and other data as available. Our results for halogen atoms agree well with the previously calculated and measured values. The present results for Cl 2 molecules also agree well with the recommended data, but those for F 2 , Br 2 and I 2 tend to differ from the data available. Inter-halogen comparisons of the presently calculated cross-sections are also made.