The rheological behavior of simple oil-in-water (O/W) emulsions and multiple oil-in-water-in-oil (O/W/O) emulsions is investigated. The simple O/W emulsions exhibit only marginal levels of shear thinning at high values of dispersed phase concentration. The multiple emulsions are found to be highly non-Newtonian in nature. The degree of shear thinning in multiple emulsions increases with the increase in primary O/W emulsion concentration. The oscillatory measurements indicate that multiple emulsions are predominantly viscous in that the loss modulus falls above the storage modulus over the entire frequency range investigated. Upon aging, the storage and loss moduli of the multiple emulsions show a significant increase. However, the increase in viscosity with aging is only marginal.