American attorneys are licensed and regulated at the state level. State Bar membership is mandatory in some states and voluntary in others. Attorney discipline is carried out through a state’s bar association, state discipline committee or by the state’s Supreme Court.
Resources:
ABA Directory of Disciplinary Agencies (January 2020)
Regulation of the Legal Profession in the United States: Overview (May 2021)
Bar Association Directory
ABA Directory of Licensing Agencies