According to the State Department's 2016 Trafficking In Persons Report:

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"The United States is a source, transit, and destination country for men, women, transgender individuals, and children - both U.S. citizens and foreign nationals-subjected to sex trafficking and forced labor. " "Victims originate from almost every region of the world; the top three countries of origin of federally identified victims in fiscal year (FY) 2015 were the United States, Mexico, and the Philippines. Particularly vulnerable populations in the United States include: children in the child welfare and juvenile justice systems; runaway and homeless youth; American Indians and Alaska Natives; migrant laborers, including participants in visa programs for temporary workers; foreign national domestic workers in diplomatic households; persons with limited English proficiency; persons with disabilities; and LGBTI individuals. "