This study focuses on the development of a sustainable lightweight geopolymer concrete (LGPC) canoe, with the goal of reducing the environmental impact of concrete construction. Eco-friendly materials, including fly ash, ground granulated blast furnace slag (GGBFS), and alcofine, were utilized in the mixture design of LGPC. To achieve a lightweight GPC mix, lightweight expanded clay aggregate (LECA), glass microspheres, and treated styrofoam residue were incorporated. A combination of sodium hydroxide and sodium silicate served as the alkaline liquids for binding. The hull design and stability analysis of the canoe were conducted using Maxsurf software. In laboratory testing, the LGPC exhibited a density of 1050 kg/ m3 and a compressive strength of 15.4 MPa. Subsequently, the construction of the canoe was carried out using the developed LGPC, with a comprehensive description of the step-by-step construction process provided. The final test involved placing the canoe in a water body, where it successfully floated. This innovative approach to creating a lightweight, eco-friendly LGPC canoe demonstrates the potential for sustainable concrete construction practices and their applicability in real-world settings.