This study aims to add to the discussion about different hypotheses on migration levels and tendencies already proposed in the literature, as well as to the discussion about the nature of population exchanges in space (Zelinsky, 1971; Ravenstein, 1980; Singer, 1980, et al). The scope of this study is also to show that the dynamics of internal migration in a developing country, such as Colombia, although adopting major urbanization tendencies that can be identified in other Latin American countries, has particularities which define a distinctive pattern of migration in its territory. This pattern is characterized by structural aspects concerning its political and administrative order, by an internal heterogeneity regarding its development level, and by its degree of advancement in the process of demographic transition.