Socio-Economic Effects of the Spatial Chaos for the Settlement Systems and Functional Land Use Structure. The aim of the study is an attempt to estimate, on the basis of literature and own analyzes, how costs are related to spatial chaos, i.e. mainly dispersion of settlement. Mainly residential (housing) settlement was addressed, which contributes the most to the defective structure of the entire settlement. In particular, the analysis uses several concentration indicators and graphical methods, including the so-called minimal spanning tree (MST). Analyzes have shown that costs can amount to several dozen billion zlotys a year, resulting due to the lack of utilities, unsatisfactory condition of public infrastructure, morphological and functional chaos, excessive location of buildings in agricultural areas, oversupply of investment land with low location potential and as a result of low economic efficiency and effectiveness of settlement.