Example embodiments relate to an image sensor that includes a semiconductor substrate integrated with at least one photo-sensing device, an impurity-doped first light-transmitting electrode present in the semiconductor substrate, an organic photoelectric conversion layer positioned on one side of the semiconductor substrate and absorbing light in a different wavelength from the wavelength sensed by the photo-sensing device, and a second light-transmitting electrode positioned on one side of the organic photoelectric conversion layer, and an electronic device including the same.