BACKGROUND Southern Europe experienced large-scale migration in the recent decades. Compared to regions with a longer migration history, the assimilation and socialization processes of family formation and age of childbearing for young adults of migrant background is underexplored. Spain, in particular, is now home to a burgeoning second generation of which little is known. OBJECTIVE This study explores the family living arrangements of Moroccans in Spain by migrant generation and time, using census microdata from the Integrated Public-Use Microdata Series International (IPUMS-i) and the Spanish Statistical Office (INE). We examine the living arrangements as an estimate for family processes for young adults of Moroccan origin between ages 20 to 34 separately by sex.