An integrated circuit includes a first cell arranged in a first row extending in a first horizontal direction, a second cell arranged in a second row adjacent to the first row, and a third cell continuously arranged in the first row and the second row. The first cell and the second cell comprise respective portions of a first power line extending in the first horizontal direction, and the third cell includes a second power line electrically connected to the first power line and extending in the first horizontal direction in the first row.