Conductivity measurements were employed to determine the critical micelle concentration (CMC), degree of dissociation and dissociation constant of dilute solutions of cerium soaps in 50% benzene and 50% N-N-dimethyl formamide (DMF) mixture (v/v). The results show that the soaps behave as weak electrolytes below the CMC. The various thermodynamic parameters were also evaluated for both dissociation and association process.