Background: Despite good policy intentions, people with intellectual disability continue to be socially excluded. Social geographers suggest the potential of self-authored spaces as catalysts for social inclusion. One such space, self-advocacy, is commonly perceived as part of a political movement for social change rather than a vehicle for social inclusion of its members. This paper investigated what involvement in self-advocacy has meant to long-term members of a self-advocacy group in Victoria, Australia. Methods: In-depth interviews were conducted with 12 self-advocates about their reflections on involvement in the group. These data together with the commentary of 5 self-advocates during interviews with 18 self-advocacy supporters about their recollections of involvement in the group were transcribed and analysed thematically. Findings: Through their involvement in self-advocacy, members of the group had gained a sense of belonging, social connections, and purposeful occupation, which included paid project work, lobbying, and organisational leadership and management. Conclusions: This study suggests that self-advocacy groups can be places that foster social inclusion, potentially offering "membership" of an exclusive group, a wider social movement and of mainstream society.