Cohabitation is a distinctive feature of low-income groups in Latin America. In the past, it has been linked to colonial legacies including notions of familial honour, poverty, and a kinship system focused on blood ties. By contrast, some scholars consider rising levels of cohabitation in the present day to be an effect of modernisation, through increased gender equality. The present research, based on life histories of young, poor, urban co-habitees in Chile, aims to show that rising cohabitation is linked to targeted social policies and also to declining patriarchy, which is distinct from gender equality.