COSA

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)
 * Colliery Officials and Staffs Area of the National Union of Mineworkers, a British trade union
 * Company of Science and Art