In this present study Lysiloma latisiliquum seed powder, a low-cost agricultural byproduct, was used as the adsorbent for the removal of cationic dye malachite green (MG) from aqueous solutions. The adsorbent was characterized by Fourier Transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), XRD analysis. Batch mode adsorption studies were performed under various experimental conditions such as contact time, initial dye concentration, pH, adsorbent dose, and temperature to assess the potentiality of the adsorbent for the removal of MG from aqueous solutions. Optimum absorption of MG was found to be at pH of 6.0, for an equilibrium time of 90min with an adsorbent dosage of 20 g/L. Kinetic data were studied using pseudo first order and pseudo second order models. The experimental results showed that it followed pseudo second order kinetics. The data fitted well with Freundlich model with a maximum adsorption capacity of 35.5871 mg/g.