Characterization, design, specific properties and applications of thermoset composites are reported. These composites are presently in high demand because they can be shaped into many-sided segments and structures, and can have a great variety of densities and special physical and mechanical properties. Keywords: Thermoset composites, Polymeric Composites, Fiber Reinforced Composites, Lignocellulosic Composites, Hybrid Bast Fibers, Epoxy Composites, Nano-Carbon/Polymer Composites, Conductive Composites, Polyurethane Composites, Wood Flour Filled Composites, Energy Absorption, Automotive Crashworthiness, Electromagnetic Shielding, Electromagnetic Field Emission Applications.