The IFPRI 2020 Conference on “Leveraging Agriculture for Improving Nutrition and Health” was held in New Delhi, India, February 10–12, 2011, and attracted more than 900 attendees. Conference activities included 12 plenary sessions, 15 parallel sessions, 14 side events, an ongoing knowledge fair with more than 25 exhibit booths and tables, six informal discussion groups, and roughly 30 “rapid fire” presentations during coffee breaks. Assessing the impact of this Conference is a task complicated by multiple issues such as assessment coverage and impact attribution. The assessment methods used here include surveys of conferees, Internet searches, website and literature searches, and extensive personal interviews. Distinctions are drawn between short-term and medium-term impacts, and also among impacts on individuals, on institutions, and on professional discourse.