At the time of the 2006 National Census, the city's population was 3,695 in 1,042 households, when it was capital of the former Avaj District of Buin Zahra County. The following census in 2011 counted 5,609 people in 1,616 households. The 2016 census measured the population of the city as 5,142 people in 1,621 households, by which time the district had been separated from the county in the establishment of Avaj County. Avaj was transferred to the new Central District as the county's capital.
Overview
Avaj lies 130 miles (210km) west of Tehran along Road 37, about 20 kilometres south by road from Abgarm. The city is in an agricultural area. Avaj was near the epicenter of the 2002 Bou'in-Zahra earthquake and thus was severely affected by it, with roughly half the town having been razed.
Climate
Climate data for Avaj (elevation:2,034.9m (6,676ft)), normals for 1997-2005
12سرشماري عمومي نفوس و مسكن 1395: استان قزوین[General Population and Housing Census 2016: Qazvin Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 30 November 2021. Retrieved 19 December 2022.
12Rahimi, Mohammad Reza (4 January 2012) [تاریخ تصویب (Approval date) 1390/10/14 (Iranian Jalali calendar)]. ایجاد شهرستان آوج به مرکزیت شهر آوج در استان قزوین[Creation of Avaj County in the center of Avaj city in Qazvin province]. مهدی داودآبادی [Mehdi Davudabadi] (in Persian). وزارت کشور [Ministry of the Interior]. هیات وزیران [Council of Ministers]. پیشنهاد شماره [Proposal Number] 62642/42/04/1. Archived from the original on 25 June 2025. Retrieved 25 June 2025.
↑سرشماري عمومي نفوس و مسكن 1385: استان قزوین[General Population and Housing Census 2006: Qazvin Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 20 September 2011. Retrieved 25 September 2022.
↑Habibi, Hassan (20 July 1997) [تاریخ تصویب (Approval date) 1376/04/29 (Iranian Jalali calendar)]. تغییرات تقسیمات کشوری در شهرستان بویین زهرا در استان قزوین[Changes in the national divisions in Buin Zahra County in Qazvin province]. لام تا کام [Lam ta Kam] (in Persian). وزارت کشور [Ministry of the Interior]. کمیسیون سیاسی دفاعی هیأت دولت [Political Defense Commission of the Government Board]. شناسه [ID] 80CDFE19-D021-4D3D-8886-DCB00934881F. شماره دوره [Course number] 76, شماره جلد [Volume number] 253. Archived from the original on 26 June 2025. Retrieved 26 June 2025.
↑سرشماري عمومي نفوس و مسكن 1390: استان قزوین[General Population and Housing Census 2011: Qazvin Province]. Iran Data Portal—Syracuse University (in Persian). مرکز آمار ایران [Statistical Centre of Iran]. Archived from the original(Excel) on 19 January 2023. Retrieved 19 December 2022.