This paper analyses how migratory flows and economic growth and crisis phases are interrelated in Chile's Los Lagos region, comparing the booming years starting at the beginning of the 1990s with the recessive period due to the salmon industry crisis -years 2007 to 2010. The main subjects treated are the way in which internal migration characteristics and regional economic growth are interlinked, changes in intra-regional migratory trends during the economic growth and crisis periods, and, finally, migration dynamics by age and their impact on Los Lagos' municipalities. 1992, 2002 and 2012 housing and population census microdata are the databases used for the analysis. It should be taken into account that even though the latter census has not been officialy validated, it can nevertheless be used for statistical purposes.