A semiconductor device includes a lower structure, a data storage structure on the lower structure, and an inductor structure on the lower structure, where the data storage structure includes first electrodes extending in a vertical direction perpendicular to an upper surface of the lower structure, a second electrode provided on the first electrodes, and a dielectric layer between the first electrodes and the second electrode, and where the inductor structure includes an inductor conductive pattern at a level that is substantially the same as a level of the first electrodes.