As one of the most populous countries in the world, migration in Indonesia has been indicated as the pre-eminent cause of the recent complex shifts in the pattern of human settlement in this country. In general, migration is closely linked to the development process, both as a result and a cause of changes in characteristics of social and economic life of the nation and its regions. The past policy on transmigration and the recent decentralization policy, for example, may influence regional economic development, which then would be expected to exert a significant impact on population distribution through migration and urbanization. This presentation outlines a detailed analysis of changes in Indonesian internal migration over the past 30 years. Selected measures from the battery of indicators proposed by Bell et al. (2002) will be used in the analysis; which include migration intensities, age selectivity, the effect of migration on settlement patterns, and temporal trends. The attention will be focused upon the implication of this situation for some social and economic issues.