Abstract: The comparative study of unmodified indigenous kaolin clays as catalysts for biodiesel production were investigated. The unmodified Iyi-Nsukka kaolinite clay and unmodified Ukpo Kaolinite clay catalysts were prepared, characterised by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Atomic abrasion spectrophotometry (AAS) to verify catalyst properties. Gmelina seed oil was extracted using Soxhlet extraction method using hexane as solvent.