<p>Aluminum matrix composites (AMCs) are widely studied for their lightweight, high strength, and corrosion resistance, making them suitable for various applications. However, fabricating AMCs using virgin aluminum and conventional reinforcements is both costly and energy intensive. Moreover, the rapid depletion of natural resources and high energy demand for raw material extraction have increased the need for sustainable alternatives. This study aims to develop a hybrid green composite by reinforcing recycled aluminum alloy scraps with alumina and waste derived eggshell ash particles through the stir casting method. Composite samples containing 0–12 wt% reinforcement in 3 wt% increments were fabricated and tested for density and mechanical properties. Results revealed that incorporating alumina and eggshell ash improved performance significantly, with the optimum combination of 9 wt% alumina and 3 wt% eggshell ash achieving increases of 29.76% in tensile strength, 45.59% in hardness, and 31.93% in compressive strength compared to the base alloy. A decrease in impact strength was observed due to the presence of hard, brittle particles. The novelty of this study lies in combining recycled aluminum with a bio-waste reinforcement (eggshell ash), which has received little attention compared to conventional reinforcements. This approach enhances mechanical performance while offering lightweight, eco-friendly solutions for low impact loading applications, thereby supporting circular economy goals.</p>