Polymer matrix composites, or PMCs, are lightweight materials with qualities that may be tailored, which has attracted a lot of interest in engineering applications. Adding nanoparticles to polymer matrices has shown to be a viable way to improve these composites’ mechanical properties even more. This work provides a thorough mechanical testing assessment of PMCs enhanced with nanoparticles. The study focuses on how the kind, concentration, and dispersion of nanoparticles affect the mechanical characteristics of composite materials. Graphene oxide, silica, and carbon nanotubes are among the several nanoparticles that are disseminated throughout the polymer matrix by a variety of processes, such as solution mixing and melt blending. A series of mechanical tests, including tensile, compressive, flexural, and impact tests, are performed on the resultant composites.