A coil component includes a drum core including a winding core portion extending in a first direction and a pair of flange portions provided at both ends of the winding core portion. At least one flange of the pair of flange portions has at least one step or gradient portion. A terminal electrode is provided on the step or gradient portion, and a wire is wound around the winding core portion with an end bonded to the terminal electrode. The terminal electrode includes plural metal layers, an outermost layer of which is an Sn film having a flattened mounting surface. The flattened mounting surface overlaps the step or gradient portion when seen in a second direction perpendicular to the first direction.