Enid Hammerman Long (born Helen Enid Hammerman; March 23, 1930 — January 27, 2002) was a trustee at Columbia College in Chicago and an advocate for better health care in the United States and developing nations. Mrs. Long was most widely known for undertaking humanitarian causes for over 25 years at the side of her third husband, Dr. John Long. Her previous marriage was to American diplomat and military officer William R. Rivkin, and she lived in diplomatic missions in Europe and Africa.