Abstract
The distribution of international migrants is an essential part of socio-geographical differentiation. In addition to international migration, internal or domestic migration plays an important role in the geographical distribution of immigrants. Based on data from the population register, the Census, and a quantitative survey, we analysed the internal mobility of Ukrainian and Vietnamese immigrants, which are the first and third largest international migrant groups in the Czech Republic. Using the assimilation perspective, the results of the analysis indicate that each ethnic group behaves differently. Specifically, the concentration of these immigrants differed at both regional and neighbourhood levels.