Radio waves have longer wavelengths than microwaves. Specifically, radio waves have wavelengths ranging from less than one centimeter up to more than 100 meters, sometimes even thousands of meters. Microwaves, on the other hand, have shorter wavelengths within the range of about 1 millimeter to 30 centimeters. This means radio waves cover wavelengths longer than microwaves on the electromagnetic spectrum. Thus, among the two, radio waves have the longer wavelength overall.