Metal and metal oxide nanoparticles, also indicated as nanocrystals or nanopowders play a vital role in many areas of physics, chemistry and material science. These are available in variable shapes, sizes as well as surface coatings. Metal oxide nanoparticles offer a variety of functionalities that remain desirable over a number of segments such as anti-corrosion, anti-bacterialism, thermal barrier, easy-clean, UV- absorbent & combinations thereof. Metal and metal oxide nanoparticles are increasingly becoming part of our daily lives and it is expected that their use will upsurge significantly in the next decade as they are being manufactured in huge quantities for usage in a diverse variety of products. Increasing research & development activities to enhance the product applications coupled with the rapid growth in the nanotechnology is anticipated to drive the metal and metal oxide nanoparticles market, and furthermore support its application in pharmaceuticals, medical and cosmetics over the forecast period.