Economic phenomena undoubtedly tend to form a large variety of agglomerations in space. It is thus natural to ask how significant these concentrations are, where they can be found and what the other aspects of these spatial arrangements are, including their practical implications. The main aim of this paper is to quantify the significance of spatial and regional concentration in respect to the overall inequality. In the empirical analysis economic variables are studied applying quantitative methods including specific ones such as Theil index decomposition and spatial autocorrelation. Contrary to the majority of thematically similar papers, this analysis is undertaken on a very detailed, municipal level which enables the authors to come to new, innovative, and more locally specific conclusions.