Small-angle neutron scattering from D2O solutions of a series of organic salts, ranging from sodium toluenesulfonate to sodium triisopropylbenzenesulfonate, has been measured. Evidence of aggregation was found, at least at high concentrations, in all cases. The patterns were interpreted by the mean spherical approximation, and estimates of the size of the species are presented. Aggregate sizes increase with increase in equivalent weight. Addition of toluene increases aggregation number. A few measurements on solutions of sodium cyclohexylane carboxylates indicate that aggregates are somewhat smaller than those of aromatic salts of about the same number of carbons.