IDMC's discussion paper provides an updated estimate of the number of IDPs in Sri Lanka, examines the dynamics of protracted displacement in the country and assesses current challenges and prospects for durable solutions. It aims to inform discussions between the government and humanitarian and development actors on how to tackle protracted displacement, particularly in relation to a durable solutions strategy and return plan which are currently being drafted. Sri Lanka’s experience of internal displacement illustrates how long-term displacement is often a development challenge that needs to be addressed first and foremost by governments and also by supporting development actors.