Geographic Information Systems (GIS) is one of the most accurate, analytical, results-based, and decision-making tools. In this context, we will try to apply this technique to the best geographical locations for the construction of industrial units in the Nador region (north-eastern Morocco); But these units vary according to the manufacturing branches. The factors in control of light industries vary compared to heavy industries. considerations in the localization of building materials units vary compared to textile units. Thus, the criteria adopted in the localization of industrial units and their indicators differ. We decided to determine several factors that influence plant location, such as proximity to industrial units, proximity standards to cities, road density, topography nature, ports, raw materials, railways, and other factors. We find that the prime locations for establishing industrial facilities and developing industrial zones are the geographical regions neighboring the town of Selouane. The most significant areas for industrial investment cover approximately 1469 hectares, notably the flatlands to the west of Selouane. Additionally, there are well-suited areas such as Azgangan, Beni Ansar, and Zaio, totaling approximately 14,211 hectares in the outskirts of these town.