Diffa is a city and Urban Commune in the extreme southeast of Niger, near that country's border with Nigeria, with a population of 23,600 (2004). It is the administrative seat of both Diffa Region, and the smaller Diffa Department. Diffa marks the eastern end of the paved section of Route Nationale 1, the main east west highway across Niger, although the section between Zinder and Diffa is only partially paved in places. RN 1 continues north to N'guigmi more than 100km. Maïné-Soroa, the other major town of the Region, lies less than 100km to the west of Diffa. The border with Nigeria, at the Nigerian town of Duji, is 5.5 km to the south of Diffa. Diffa Airport lies to the north of the town.
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