and investigate the kinetic model of its dissolution. The raw and modified clay were characterized using X-Ray Florescence (XRF) for chemical composition. The modified clay was thermally activated at the temperature of 800 ^oC and periods of 60minutes. The activated clay was ground and leached by varying particle sizes, acid concentration, liquid to solid weight ratio, stirring speed and leaching temperature. The dissolution kinetics was carried out and the data were analyzed using the various forms of shrinking core models. The characterization showed that Agbaja clay is kaolinitic in nature. Analysis of the dissolution data showed that the process increased with increased in leaching temperature, stirring speed, liquid to solid ratio and solvent concentration but decreased with decreased in particle size. The kinetic model that best fits the process is the Liquid film diffusion controlled process for the reaction kinetics of Agbaja clay dissolution in hydrochloric acid. Hence, the application of the simple and low cost modification techniques employed in this study has shown that Agbaja clay is rich source of iron oxide.