The kinetics of the flocculation of iron oxide sol by polyacrylamide has been studied by turbidity measurements. Various kinetics parameters such as per cent flocculation, flocculation rate and rate constants for the flocculation and deflocculation have been evaluated. Both the qualitative and quantitative effects of various parameters such as polymer dosage, pH of the suspension, salt concentration and molecular weight of the polymeric flocculant on the kinetics of flocculation have also been investigated.