An electronic apparatus and a layout method for an integrated circuit (IC) are provided. The layout method for the IC includes: receiving layout information, analyzing the layout information to obtain a plurality of blank areas in the IC; presetting a plurality of dummy blocks which respectively have a plurality of sizes; selecting at least one of the dummy blocks to fill in each of the blank areas based on a center position of each of the blank areas according to a size of each of the blank areas and generating updated layout information; performing a layout density checking operation on the updated layout information to generate a checking result; and shrinking sizes of a plurality of setting dummy blocks in the IC according to the checking result and generating output layout information.