Ruydar District () is in Khamir County, Hormozgan province, Iran. Its capital is the city of Ruydar.
After the 2006 National Census, the village Ruydar was elevated to the status of a city.
At the time of the 2006 census, the district's population was 11,628 in 2,675 households. The following census in 2011 counted 13,459 people in 3,512 households. The 2016 census measured the population of the district as 14,327 inhabitants in 4,314 households.