Production areas deeply affect both the production of urban areas and the formation of the socio-spatial geography of the cities. Industrializa- tion brings with it studies that form the foundations of urban science. Today, our cities are faced with deindustrialization processes and come to the agenda with new socio-spatial problems brought about by this situation. Contemporary urban science literature focuses on new forms of urban segregation, such as gated communities and gentrification. Do the classical definitions of cities before the 1980s still exist today? The study seeks answers to this question in the city centre of Manisa, which was industrialized in the 1970s. Geographical and demographic rea- sons have been underlying the development of Manisa as a leading in- dustrial city. The valuable agricultural lands offered by the Gediz Hav- zası (Gediz Basin) have made the city of Manisa one of the important agricultural areas of Turkey and even Europe. The fact that it is connec- ted to İzmir, one of the developed cities of the region, and thus to the port areas by rail and highway, is the precursor of a large-scale indust- rial organization. The largest of the developing industrial areas is the region located in the city centre of Manisa and established on an area of 110 hectares, known today as the Manisa Organized Industrial Zone (MOIZ). This region, which employs approximately 60,000 people, is concrete proof that a city with a population of 356,000 has developed completely depending on itself. Manisa city centre has undergone an administrative change due to the increasing population and the spatial expansion of its urban areas. Manisa city centre was divided into two local government units, Yunusemre and Şehzadeler, with the decision taken in 2012. Needs such as establishing a new district centre in the city centre separated by two local governments and various urban transformation projects came to the fore in this direction. Manisa, which reflects various divisions in the city with its internal dynamics, is faced with direct interventions. The problem definition of this rese- arch is that the residential areas in the city centre of Manisa contain concrete and intangible thresholds that almost match the definitions of Engels in Manchester. In this direction, the primary purpose of the study is to determine the degree of socio-economic segregation in resi- dential areas and to develop basic suggestions for urban integration.