The migrants’ participation in the elections of their country of origin is a worldwide trend. The literature has mostly looked at why and how States enfranchise their citizens abroad, but little attention has been paid to the latter’s voting behavior. This paper explores the relation between the geography of external electoral behavior and the transnational social spaces of migration. It looks at the participation and the vote of the Tunisians abroad in three different elections: for the Constituent Assembly (October 2011), for the Parliamentary (October 2014), and for the President (November/December 2014). It adopts a geographic, multi-scale and diachronic approach, and builds on original maps at the national level and at the local level (i.e.: migrants’ countries and cities of residence). The results suggest that socio-demographic variables and internal dynamics within the migrants’ community are key to explain the formation of political opinions abroad.