Internal migration or domestic migration is human migration within a country. Internal migration tends to be travel for education and for economic improvement or because of a natural disaster or civil disturbance,[1] though a study based on the full formal economy of the United States found that the median post-move rise in income was only 1%.[2]
A general trend of rural-to-urban migration, in a process described as urbanisation, has also produced a form of internal migration.[3]
Internal migration is often contrasted with cross-border or international migration.[3]