The Massachusetts Association of REALTORS® is a professional trade association for licensed real estate practitioners and serves as the parent organization to the state's 16 local REALTOR® associations. Membership in the organization is voluntary and consists of both residential and commercial agents and brokers as well as industry affiliates. MAR's membership currently consists of approximately 20,000 real estate licensees, and only MAR members are authorized to use the trademark term, REALTOR®.