This research article describes the results of nano-silica (nSiO2) filled epoxy (Ep) mono composites with different contents (0.5, 1.0, 1.5, 3, and 5 wt.%) and carbon fabric-reinforced epoxy (CFE) with 1.5 and 3 wt.% of nSiO2 hybrid composites and their physical and mechanical properties characterized by different techniques as per ASTM standards. Mechanical mixing and sonication techniques were followed to disperse nSiO2 into Ep resin. Furthermore, the same nSiO2/Ep is reinforced with carbon fabric by hand lay-up followed by vacuum-bagging technique. The morphological features were studied by scanning electron microscopy. The properties of the Ep based mono and hybrid composites showed that the hardness, tensile strength/modulus, and flexural strength/modulus, as well as impact strength of the composites enhanced with nSiO2 wt.% up to 3 wt.% for mono and hybrid composites and decreased thereafter; suggesting that the beneficial properties ensued up to 3 wt.% nSiO2 content.