Tarhan DistrictTarhan District is in Kuhdasht County, Lorestan province, Iran. Its capital is the city of Garab.DemographicsPopulationAt the time of the 2006 National Census, the district's population was 17,648 in 3,458 households. The following census in 2011 counted 16,101 people in 3,766 households. The 2016 census measured the population of the district as 12,730 inhabitants in 3,513 households.