Dergajen (or Derge Agen) was a woreda in Enderta Province, in Tigray Region, Ethiopia. Its administrative center was Kwiha; now is a tabia (municipality) located 19 kilometers east of Kwiha, Ethiopia. The administrative center of the tabia is located in the village of Aragure. A weekly market is organized in Aragure. According to the 2007 census, 9524 people were living in the tabia, which results in a population density of 68 inhabitants per square kilometer.