|Rural District||Rudbar-e Shahrestan|
|Time zone||UTC+3:30 (IRST)|
|• Summer (DST)||UTC+4:30 (IRDT)|
Qostin Naheyeh (Persian: قسطين ناحيه, also Romanized as Qosṭīn Nāḥeyeh) is a village in Rudbar-e Shahrestan Rural District, Alamut-e Gharbi District, Qazvin County, Qazvin Province, Iran. At the 2006 census, its population was 243, in 64 families.
- "Census of the Islamic Republic of Iran, 1385 (2006)". Islamic Republic of Iran. Archived from the original (Excel) on 2011-11-11.
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