Oncology Nursing Society

The Oncology Nursing Society (ONS) is a nonprofit membership organization of more than 35,000 members committed to promoting excellence in oncology nursing and the transformation of cancer care.

ONS traces its origin to the first National Cancer Nursing Research Conference, supported by the American Nurses Association and the American Cancer Society in 1973. Following this conference, a small group of oncology nurses met to discuss the need for a national organization to support their profession. Since its official incorporation in 1975, it has grown to include 215 chapters. It provides information and education to nurses around the world. In addition, the society plays an active role in advocacy activities at the local, state, national, and international levels. ONS produces the largest conference dedicated to oncology nursing, Congress, held annually.