This paper examines the socio-spatial structures in three medium-sized towns in Pomerania, Poland: Lębork, Szczecinek, and Wałcz. The study focuses on demographic changes, population movement, and the increasing spatial segregation of social groups, particularly the unemployed and impoverished. It also discusses the resulting social problems and changes in quality of life. The research employs a combination of quantitative and qualitative methods, including field studies, surveys, and statistical analysis. The findings reveal a slow process of peripheral area development, demographic aging, and intra-urban migration. The distribution of housing quality correlates with wealth, with the rich concentrating in isolated enclaves and the poor in areas with old, depreciated construction. The study concludes with a model of socio-spatial differentiation in these towns, highlighting five zones of similar character: the city center, the periphery of the city center, neighborhoods of single-family housing, large housing estates, and new and exclusive buildings. The model reflects the legacy of previous socio-political formations and the influence of new forces on the urban landscape.This paper examines the socio-spatial structures in three medium-sized towns in Pomerania, Poland: Lębork, Szczecinek, and Wałcz. The study focuses on demographic changes, population movement, and the increasing spatial segregation of social groups, particularly the unemployed and impoverished. It also discusses the resulting social problems and changes in quality of life. The research employs a combination of quantitative and qualitative methods, including field studies, surveys, and statistical analysis. The findings reveal a slow process of peripheral area development, demographic aging, and intra-urban migration. The distribution of housing quality correlates with wealth, with the rich concentrating in isolated enclaves and the poor in areas with old, depreciated construction. The study concludes with a model of socio-spatial differentiation in these towns, highlighting five zones of similar character: the city center, the periphery of the city center, neighborhoods of single-family housing, large housing estates, and new and exclusive buildings. The model reflects the legacy of previous socio-political formations and the influence of new forces on the urban landscape.