KuhinKuhin is a city in, and the capital of, Kuhin District in Qazvin County, Qazvin province, Iran. It also serves as the administrative center for Ilat-e Qaqazan-e Gharbi Rural District. The village of Kuhin was converted to a city in 2002.DemographicsLanguage and ethnicityThe people of Kuhin are Turks and speak Azerbaijani Turkish.PopulationAt the time of the 2006 National Census, the city's population was 1,398 in 388 households. The following census in 2011 counted 1,622 people in 414 households. The 2016 census measured the population of the city as 1,411 people in 418 households.