Heat transfer to electrolyte solutions is a common engineering problem in the chemical and petrochemical industries. Nevertheless, only a few experimental investigations of heat transfer to electrolyte solutions can be found in the literature. To improve design of heat transfer equipment and to understand fouling characteristics, it is important to know the clean heat transfer coefficient of electrolyte solutions, and whether heat transfer to electrolyte solutions can be predicted with models found for less complicated fluids. A wide range of experiments were performed to determine the effects of various dissolved salts on forced-convective, pool boiling, and subcooled flow-boiling heat transfer. The effect of dissolved salts on bubble size and nucleation site density were also investigated. The measured heat transfer coefficients are compared with recommended correlations for the different heat transfer modes.