Shirin Su District (Kabudarahang County)Shirin Su District is in Kabudarahang County, Hamadan province, Iran. Its capital is the city of Shirin Su.DemographicsPopulationAt the time of the 2006 National Census, the district's population was 23,015 in 4,852 households. The following census in 2011 counted 25,028 people in 6,598 households. The 2016 census measured the population of the district as 20,927 inhabitants in 6,031 households.