in this area. IFL 2001 was held in September 2001 and attracted 43 researchers from the international functional language community. During the 3 days of the workshop, theypresented no fewer than 28 contributions. The contributions covered topics on the implementation, and also the use of functional languages. This volume follows the lead of the last ?ve IFL workshops in publishing a high-qualitysubset of the contributions in Springer¿s Lecture Notes in C- puter Science series. All speakers at the workshop were invited to submit a paper afterwards. These submissions were reviewed bythree or four referees and th- oughlydiscussed bythe program committee. From all submissions, 11 papers were selected for publication in this volume.