The Tucson Association of REALTORS® is the largest trade association in Southern Arizona, representing the interests of over 6,500 professionals in the real estate industry. The Multiple Listing Service (TAR/MLS), a wholly-owned subsidiary of the Tucson Association of REALTORS®, is a reliable, cooperative real estate database of listing and sale information in Southern Arizona. The Tucson Association of REALTORS® was established in 1921 as the Real Estate Board of Tucson. We support the healthy growth of Southern Arizona's real estate market and are dedicated to improving our community.