When the popularity of the populist radical right increases, questions arise. Where are these parties successful? Does the geographic distribution of the supporting change with changes their primary issues? This article analyzes spatial aspects in the support of populist radical right parties in Slovakia and Czechia and their change over time. The spatial distribution was examined using spatial autocorrelation . The results showed that this parties have strong support in “left-behind” regions and peripheral rural regions and weak support in the surroundings of largest cities. The distribution of support for parties also changed more significantly when the parties changed the presented main issues. In Slovakia there was visible spatial competition between the traditional populist radical right party, the Slovak National Party (SNS), and newer and adaptable party, the People’s Party Our Slovakia (ĽSNS). ĽSNS succeeded in areas with traditionally strong support for SNS thanks to changes in its main electoral themes. In Czechia, the distribution of support between Dawn and Freedom and Direct Democracy (SPD) has changed. Dawn had a support distribution similar to the populist party Public Affairs, which shared ideas of direct democracy. SPD’s support distribution was closer to areas traditionally supporting the populist radical right.