Metal nanoparticles have long been considered to exhibit unique physical and chemical properties different from those of the bulk state or atoms due to the quantum size effect, resulting in specific electronic structures. These properties can be controlled not only by varying material composition but also by tuning size and shape of nanoparticles. Among metal nanoparticles, gold nanoparticles probably have the most attracted considerable interest and can be utilized in numerous applications ranging from catalyst, sensing, and self-assembly. We have developed facile and simple synthetic strategies for creating monodispersed gold nanoparticles in high yield with fine control over their shape and size mainly using a seedless method.