The present study evaluates the feasibility of an adsorbent prepared from Annona squamosa (custard apple) peel, in removing Congo red dye from its aqueous solution. Batch experiments were carried out to study the effect of various parameters like pH (2-8), adsorbent dose (0.005-0.5 g/100mL), contact time (5-120 min), initial dye concentration (25-200 mgL–1) and temperature (298-308 K) to determine its effectiveness as an adsorbent. Maximum dye removal was attained at pH 2, adsorbent dose 0.1 g/100 mL in equilibrium time of 45 min at 308K. Adsorption kinetics using pseudo-first order and pseudo-second order models, and adsorption isotherm using Langmuir and Freundlich models were studied. The adsorption process was found to follow pseudo-second order kinetic model and it more favorably described the Langmuir isotherm model. Removal of Congo red dye from its aqueous solution by custard apple peel was an endothermic process with negative Gibbs free energy signifying its spontaneous nature. The results of the present study suggest that custard apple can be effectively used as an adsorbent to remove Congo red dye from aqueous solution. © 2019 Journal of Urban and Environmental Engineering (JUEE). All rights reserved.