Regional differences in income inequalities are high in all large OECD countries and in some small countries with a dominant urban centre (e.g. Belgium). The regional dispersion in the Gini index of disposable household income is highest in the United States, while the largest levels of the Gini are observed in Mexican and Chilean regions. Conversely, the two regions of New Zealand have an almost identical Gini index,and low differences in the Gini are observed across regions of the Slovak Republic and Finland.