Palm oil mills have emerged as significant contributors to industrial pollution in recent years. As concerns over environmental issues and global warming continue to gain traction in society, research efforts focusing on palm kernel shell reinforcement composites have intensified. The use of eco-friendly materials serves as a primary motivation for researchers in this field. In order to investigate the mechanical properties of palm kernel shell composites, the Taguchi method was employed. Palm oil kernel shell weight percentage and tensile test speed significantly affected tensile strength, modulus of elasticity, and elongation at break. In line with the ASTM D638-14 standard, modifications were made to the mold, and several specimens were subsequently developed. Tensile specimens, comprising 30%, 40%, and 50% palm kernel shell composites, were carefully fabricated. The mechanical properties of the palm kernel shell composites were evaluated using the universal testing machine and the Taguchi method orthogonal array L9. The findings from the Taguchi analysis revealed that a weight percentage of 40% was recommended. The tensile strength was measured to be 22.06 N/mm2, the modulus of elasticity was determined to be 2216.82 N/mm2, and the elongation at break was 1.87%. Notably, the palm kernel shell composites’ mechanical properties were independent of the weight proportion. This observation suggests that palm kernel shell composites can potentially replace existing products with biodegradable alternatives, thereby mitigating pollution from costly decomposition processes.