Nearly two years after the official end of the conflict with the Islamic State of Iraq and the Levant (ISIL), more than 4.5 million internally displaced persons (IDPs) have returned to their places of origin across eight governorates in Iraq. The Return Index measures the severity of physical and social conditions in the locations to which they are returning. This third Thematic Series report focuses on the dynamics and drivers of re-displacement, a type of secondary displacement referring specifically to “IDPs who return to their areas of origin but are unable to achieve sustainable solutions and are consequently displaced again to their first place of displacement or to a new location of displacement.” Despite some gradual improvements of conditions in return areas in Iraq, if local conditions in origin remain severe for a long period of time or undergo a sudden deterioration, returns may not be sustainable. It is in these contexts that returnee families may face pressures to leave again – in other words, they may re-displace. This report explores which push factors play a role, and to what degree, in making a location more likely to have families re-displacing, through correlating the data on locations with secondary displacement with Return Index indicators on the locations’ physical and social conditions.