At the time of the 2006 National Census, the population was 1,604 in 489 households, when it was the village of Guzal Darreh-ye Sofla in Guzal Darreh Rural District of the former Soltaniyeh District of Abhar County.[7] The following census in 2011 counted 1,448 people in 484 households.[8] The 2016 census measured the population of the village as 1,532 people in 542 households, by which time the district had been separated from the county in the establishment of Soltaniyeh County. The rural district was transferred to the new Bagh Helli District.[5] It was the most populous village in its rural district.[2]
Guzal Darreh-ye Sofla was elevated to the status of the city of Guzal Darreh in 2024.[3]
^Formerly Guzal Darreh-ye Sofla (گوزلدره سفلي),[3] also romanized as Gowzal Darreh Soflā, Gowzaldareh Soflā, and Gūzal Darreh-ye Soflá; also known as Gowzal Darreh, Gowzal Darreh-ye Pā’īn, Gowzaldareh Pā’īn, Gozal Darreh, Gozal Darreh-ye Pā’īn, Gozaldarreh-ye Pā’īn, Gozaldarreh-ye Soflá, Qezel Darreh, and Qizil Darreh[4]
^Guzal Darreh-ye Sofla can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3065050" in the "Unique Feature Id" form, and clicking on "Search Database".