Fuladlu Quyi () is a village in Gug Tappeh Rural District of the Central District in Bileh Savar County, Ardabil province, Iran.
At the time of the 2006 National Census, the village's population was 1,702 in 390 households. The following census in 2011 counted 1,883 people in 508 households. The 2016 census measured the population of the village as 1,402 people in 426 households.