High Quality Content by WIKIPEDIA articles! Below is a list of unions affiliated with the AFL-CIO. Since its founding in 1886, the AFL-CIO and its predecessor bodies have been the dominant labor federation (at least in terms of the number of member workers, if not influence) in the United States. As of June 30, 2008, the labor federation had 11,013,317 members. As of 2010, the AFL-CIO had 57 member unions.