The data illustrates the leading 20 e-retailers worldwide in 2015, based on retail revenue. In that year, Amazon was the world's leading retailer with about 79.27 billion USD worth of revenue. Amazon is headquartered in the U.S., one of the leading e-commerce markets worldwide. In 2016, retail e-commerce sales in the United States amounted to over 322 billion USD and are projected to surpass 485 billion USD in 2021. The total net sales of the top online retailers by revenue added up to more than 1,304 billion USD in 2017.
