Zavin District () is in Kalat County, Razavi Khorasan province, Iran. Its capital is the city of Shahr-e Zow.
The village of Chenar was converted to a city in 2021.
At the time of the 2006 census, the district's population was 16,632 in 3,859 households. The following census in 2011 counted 15,811 people in 4,238 households. The 2016 census measured the population of the district as 14,417 inhabitants in 4,215 households.