Manufacturing in the United States is the transformation of raw materials into new products. It is a vital part of the U.S. economy, accounting for more than 12% of the nation’s gross domestic product (GDP). Manufacturing is a major source of employment, with more than 12 million people employed in the sector. The U.S. is the world’s second-largest manufacturer, behind China. The U.S. is also the world’s largest exporter of manufactured goods.