The International Federation of Adapted Physical Activity (IFAPA) has three purposes; international cooperation, promoting and stimulating research, and dissemination of adapted physical activity knowledge. This historical paper describes the emergence and growth of these three purposes by IFAPA. It also explores IFAPA’s progress from a small organization based in Québec to an international corporation with active regional federations in Europe, North America, and Asia, and delegates from over 50 countries at some of its symposia. Part 1 (Reid, 2015) dealt with three time periods; precursor context, 1960-1973; beginnings, 1973-1981; and awkward adolescence, 1981-1989. Part 2 will cover two periods; maturing procedures and international growth, 1989- 1999, and strategic planning and technology, 1999-2012; as well as a section on IFAPA symposia. The conclusion offers an evaluation of IFAPA’s success in realizing its purposes and suggests some existing challenges.