Kolowr (Persian: كلور)[a] is a city in, and the capital of, Shahrud District in Khalkhal County,[3] Ardabil province, in northwestern Iran.

It also serves as the administrative center for Shahrud Rural District.

The native language in Kolowr and other areas of Shahrud District is Tati.

[5] At the time of the 2006 National Census, the city's population was 2,380 in 675 households.

[7] The 2016 census measured the population of the city as 2,347 people in 784 households.