Abstract: Production of porous carbon from bio-waste would enable a step towards sustainable, green and eco-friendly energy storage devices. This is since several energy storage devices, including supercapacitors rely on activated carbon. With this as the context, in this work, activated carbon (AC) with porous structures are derived from Bitter guord (BG), known in literature as Momordica charantia (MC). Momordica charantia seeds (MCS), usually discarded as a waste, are carbonized and chemically activated via heating in inert atmosphere to produce activated carbon. This is then used to make working electrodes for energy storage application. ACs are prepared from different activating agents to achieve better physiochemical properties. AC obtained from KOH activation is highly porous with a specific surface area of 770 m² g^-1. The potential of the MCS electrodes for supercapacitors is evaluated in 3-electrode and 2-electrodes systems. MCS electrodes with KOH electrolytes exhibit a specific capacitance of 288 F g^-1. The supercapacitor device deliver a maximum energy density of 20 Wh kg^-1 and a maximum power density of 10 kW kg^-1 with ̴ 100% cyclic stability after 10000 cycles at 2 A g^-1. Additionally, the electrode showed a superior performance in terms of its leakage current. The leakage current density measured was 29 μA g^-1 at 1 V which is better than most of the reported values for porous carbons obtained from various bio-sources. The superior and stable performance of this carbon material makes MCS a potential electrode material towards production of sustainable EDLC supercapacitors.