Green concrete is a sustainable and eco-friendly solution as a building material. Conventional concrete releases huge volumes of carbon dioxide, which leads to environmental pollution. In green concrete, cement is partially replaced with by-products of the industrial production process of other materials or recycled waste. This study investigates the mechanical and physical properties of green concrete based on the partial replacement of cement with Ground Granulated Blast Furnace Slag (GGBS) and fine aggregates with bagasse ash. A series of trial mixes were conducted to determine the optimal mix design for the green concrete, and a sufficient number of samples were prepared and tested for various properties, including compressive strength, tensile strength, flexural strength, water absorption, and porosity. The results indicate that the green concrete containing GGBS and bagasse ash as partial replacements for cement and fine aggregates, respectively, exhibited comparable or even higher compressive strengths than traditional concrete. The green concrete also exhibited lower water absorption and porosity, indicating improved durability. The findings suggest that green concrete based on GGBS and bagasse ash has significant potential as a sustainable building material.