Community sponsorship is increasingly of interest to a number of states seeking to expand or enhance supports available for refugees. This knowledge brief illuminates one particular aspect of sponsorship often referred to as ‘secondary migration.’ It seeks to understand why some sponsored refugees choose to stay in their initial community of settlement, while others decide to move on during or shortly after the end of their sponsorship period. This brief uses a comprehensive review of relevant literature to respond to the following questions: what are the factors that lead to secondary migration of refugees and what impact, if any, does sponsorship have on these decisions for sponsored refugees?  The brief begins with an overview of the available evidence on secondary migration for resettled refugees—both government-led and sponsored—before turning to an analysis of the unique push and pull factors inherent to sponsorship.