The articl7e examines the cities and towns in the Liège region during industrialization in the ninteenth century, focusing on the relationship between marriage, migration, and entry of people into urban areas. The average age at marriage was higher for in-migrants than for natives, but so was the intensity of nuptiality. Thus, the average age at marriage is not the sole statistic through which to approach questions about the socio-demographic consequences of arrival into town. Towns had several, seemingly closed, marriage markets, and it is important to pay attention to differential behaviors by taking this fact into account. Moreover, in-migration to an industrial city created opportunities to contract marriage, for women as well as men. Sometimes marriages occurred in the village, and were contracted to escape the old system and to prepare for the migration to the city of the young couple. Structural as well as life-course approaches must be combined for a thorough understanding of migration to industrializing cities.