<p>The shift toward eco-friendly sustainable materials has increased the search for reinforcements obtained from agricultural and domestic waste. Development of composites with calcined eggshell powder and millet stalk fibers is within the scope of green sustainable composites. The purpose of this research is to fabricate epoxy composites using these waste materials with the goal of achieving sustainability for skateboards. Six samples of the composite were made with different amounts of epoxy resin, calcined eggshell powder and millet stalk fibers. The composites were tested for their mechanical, physical and Environmental properties. Moreover, the matrix-fiber interaction was studied using scanning electron microscope images (SEM) imaging. This study demonstrates a novel combination of bio-waste reinforcements that not only enhances composite performance but also meets the durability and environmental demands of real-world skateboard applications. Of all the samples, Sample 5 (75% epoxy, 5% calcined eggshell powder, 20% millet stalk fibers) was identified for maximum performance with strongest being the most durable, moisture resistant composite. Furthermore, SEM analysis showed strong fiber-matrix bonding. This clearly highlights the use of local wastes in composites without compromising performance for practical application.</p>