The high shielding efficiency (SEShielding Effectiveness (SE)) of high electrical conductivityConductivity metals and their alloysAlloy makes them appropriate as shielding materials. Their weight, stiffness, and corrodibility have driven studies on substitutes for metals. Therefore, EMIElectromagnetic Interference (EMI) shielding materials must be lightweight, thin, and fabricationFabrication-friendly. The material’s biodegradability and environmental friendliness will also help develop sustainable engineering products. Polymeric materials and compositesComposite possess light weight and corrosionCorrosion resistanceResistance, other favorable properties that aid EMIElectromagnetic Interference (EMI) shielding. This chapter offers a comprehensive review of polymeric and compositeComposite shielding materials. Nanofiller-infused polymersPolymer for the design of novel EMIElectromagnetic Interference (EMI) shielding material are also explored in this chapter.