The Zarafshon is a river in Tajikistan and Uzbekistan in Central Asia. Its name, "spreader of gold" in Persian, refers to the presence of gold-bearing sands in the upper reaches of the river. To the ancient Greeks it was known as the Polytimetus. It was also formerly known as Sughd River. The river is 877 kilometres (545 mi) long and has a basin area of 17,700 square kilometres (6,800 sq mi).