Ab initio effective core potential computations are used to describe neutral and ionic sodium halide clusters. Energies, structural parameters, and vibration frequencies have been determined for neutral and singly charged Na(n)X(m) (n = 1-3; m = 1-2; X = Cl, Br, I) species. Dissociation energies have been estimated from energy differences between isolated products and reactants. Examination of Mulliken atomic charges, together with structural data, provides some insight into the nature of binding in these molecules and ions.