The American Medical Association (AMA) is a professional association and lobbying group of physicians and medical students. Founded in 1847, it is headquartered in Chicago, Illinois. Membership was 271,660 in 2022.

The AMA's stated mission is "to promote the art and science of medicine and the betterment of public health." The Association also publishes the Journal of the American Medical Association (JAMA). The AMA also publishes a list of Physician Specialty Codes which are the standard method in the U.S. for identifying physician and practice specialties.

The American Medical Association is governed by a House of Delegates as well as a board of trustees in addition to executive management. The organization maintains the AMA Code of Medical Ethics, and the AMA Physician Masterfile containing data on United States Physicians. The Current Procedural Terminology coding system was first published in 1966 and is maintained by the Association. It has also published works such as the Guides to Evaluation of Permanent Impairment and established the American Medical Association Foundation and the American Medical Political Action Committee.

Susan R. Bailey, the third consecutive female president of the AMA and an allergist and immunologist from Fort Worth, Texas, was sworn in as president in June 2020. The current president is Jack Resneck Jr., a dermatologist from San Rafael, California.