IUCN Sri Lanka is the National Secretariat of Mangroves for the Future (MFF) regional initiative that is being implemented in the country since 2008. MFF Sri Lanka implemented over 82 small grants to date and as an innovative step, decided to allocate resources to better understand the post-project sustainability of MFF projects. Fifty nine (59) projects have been implemented during 2009-2012 of which 54 were evaluated. The evaluation was carried out from mid June to end August 2014. Sustainability of past projects was evaluated in terms of (a) implementing organization type (grantee) and (b) thematic areas. This enabled to understand what type of organizations generally produce sustainable project outputs and also the thematically focused projects that are sustainable.