The chapter deals with the issue of socially excluded localities in Czechia, specifically these localities in the suburbs, which are not rare due to the natural distribution of cheap housing and municipal tactics to push the phenomenon out of city centers despite regional and state integration strategies. Marginalized groups then emerge on the edge of urban space and majority society. Socially excluded localities in Czechia are mostly not whole neighbourhoods but specific streets, buildings or hostels in unattractive suburbs of industrial or working-class origin. Excluded groups generally suffer from low-quality transport possibilities and education, healthcare or employment options and low social capital. The majority society also stigmatizes them. In Czechia, socially excluded localities are mainly connected to the Roma population, so the ethnic side of the problem, which is considered segregation by many scholars, cannot be omitted. The topic is very actual because, according to governmental documents, the number of socially excluded localities and people endangered by social exclusion is growing. The highest concentration of socially excluded localities is in the postindustrial border regions undergoing socioeconomic transformation. For a detailed view and illustration of the geographic distribution of socially excluded localities in the suburbs, the Česká Lípa administrative district with extended powers in the Liberec Region was chosen because the author knows it well from personal experience. This district was originally known for uranium mining and processing and its military area, Ralsko. It was attractive because of its job opportunities and demographically grew during late socialism, but nowadays, it shrinks and belongs to the poorer and less attractive ones with increasing social exclusion. The main goals of the text are the geographic and socioeconomic characteristics of suburban socially excluded localities in Czech post-socialist towns and their hinterlands resulting in various typologies. The chapter outlines the terminology and theoretical basis of social exclusion, which is not only spatial but also pervades into other dimensions. The analysis is interdisciplinary but mainly grounded in human geography. It is based on desk research of various documents, analysis of available statistics, geographical analysis and non- participant observation in the Česká Lípa District.