Macaranga gigantea (otherwise called Mahang Gajah, or Giant Mahang) is a large, fast-growing, and dioecious evergreen tree in the Euphorbiaceae family native to Southeast Asia (SEA). It is commonly used in traditional medicine, as well as for ornamental, ecological, and cultural purposes. It also plays an important role in the human and ecosystem interactions in the rainforests of SEA. However, M. gigantea generates large quantities of biomass from its broad, peltate, and trilobed leaves measuring 20-60 cm in length. Similarly, its high rate of leaf litter accumulation presents opportunities for valorisation into solid biofuels. Torrefaction is considered a technologically efficient and environmentally friendly approach for the valorisation of agroforestry biomass wastes into biocoal for clean energy applications. However, there are currently no studies in the literature on the torrefaction of M. gigantea leaves (MGL) into biocoal. Therefore, this study seeks to explore and highlight the biocoal potential of MGL through TGA torrefaction under a non-oxidative environment from 200-300 °C (ΔT = 50 °C) at 20 °C/min and 30 minutes. Results revealed that MGL experienced mass losses (M_L) which increased from 15.57-40.94%, whereas mass yields (M_Y) decreased from 84.43 to 59.06%. The higher heating value (HHV) increased from 21.30 to 23.67 MJ/kg and energy density (D_E) increased from 1.16 to 1.29, whereas energy yield (E_Y) decreased from 98.02 to 76.19%. The variations in M_L and M_Y may be due to the effect of torrefaction temperature on the dehydration, devolatilisation, and thermochemical degradation of MGL moisture, volatile matter, and holocellulose (hemicellulose and cellulose). In contrast, the high HHV and D_E values may be due to a decrease in the oxygen-to-carbon (O/C) and hydrogen-to-carbon (H/C) ratios. Overall, the study showed that the torrefaction of MGL is a potential route for the valorisation of the agroforestry wastes into biocoal, a solid biofuel with fuel properties similar to lignite and sub-bituminous coals.