Ouallam is a town around 90 km north of Niamey in southwestern Niger. It is the capital of Ouallam Department, one of four departments in the …Ouallam is a town around 90 km north of Niamey in southwestern Niger. It is the capital of Ouallam Department, one of four departments in the Tillabéri Region. In 2013 it had a population of 68,191. Historically centered in the lands of the Djerma people, Ouallam has important minorities of rural and urban Tuareg and Fula peoples. It is the main town of the rocky Sahel highlands called the Zarmaganda plateau, and is one of the traditional homes of the Djerma people and one of the places in which they coalesced as an ethnicity in the 15th and 16th centuries. The area had been along an important trade route to the Aïr Mountains, used by the Songhay Empire, and was later controlled by a series of Tuareg confederations.