These databases contain a set of residential segregation values for several municipalities of Spain. On the basis of data on the income distribution of most municipalities provided by the Instituto Nacional de Estadística for the years 2015-2020, the databases contain the values of the Dissimilarity Index for all cities, towns and villages with two or more census tracts. Each database corresponds to the segregation of two different population groups: the segregation of the population below the poverty line versus the rest of the population; and the segregation of households with income above 200% of the median income versus the rest of the population. Original raw data can be extracted here. The data of these databases was displayed in the website of the author, and the code for creating the databases can be consulted here.