COSA is an acronym and may refer to:
- Circles of Support and Accountability, are groups of volunteers with professional supervision to support sex offenders as they reintegrate into society after their release from incarceration
- Committee on Sustainability Assessment, a non-profit global consortium of institutions, which uses participatory methods to pioneer the scientific measurement of sustainability in agriculture
- COSA, a 12-step family program of Sex Addicts Anonymous
- Children's Organization of Southeast Asia (COSA)
|This disambiguation page lists articles associated with the title COSA.
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