Top Oncology Conferences in 2026: The Cancer Care Calendar

The oncology conferences that define the 2026 cancer care calendar serve distinct audiences, from the scientists presenting the latest cancer research to the clinicians, patient advocates, and industry and health system leaders who turn that research into oncology care.

The calendar runs from large scientific congresses to the executive forums where adoption is decided, and the strongest strategy treats both as essential. Several spring meetings, including ASCO and AACR, have already concluded as of mid-June, so the next scheduled date is given where the 2026 edition has passed.

1. The Health Management Academy Oncology Forum

September 14-16, 2026 | Boston, MA

Most oncology conferences are where the science is presented. The Oncology Forum hosted by The Health Management Academy (THMA) is where adoption is decided. It is a small, closed-door, retreat-style meeting that pairs pharma and health tech leaders with senior oncology service line executives at a strict one-to-one health system-to-industry ratio, focused on clinical pathway inclusion, formulary positioning, and what drives or stalls real-world prescribing. Founded in 1998, THMA convenes more than 600 health system C-suite members and over 300 industry members, including oncology leaders from systems such as Mayo Clinic, Cleveland Clinic, and Cedars-Sinai.

2. ESMO Congress

October 23-27, 2026 | Madrid, Spain

The European Society for Medical Oncology Congress is one of the most influential global oncology platforms, drawing clinicians, researchers, and patient advocates to Madrid. ESMO leans heavily into translational cancer science and precision medicine, and it is a primary venue for first announcements of practice-changing clinical data. Its program also examines the emerging role of artificial intelligence in cancer diagnosis and treatment planning, alongside immuno-oncology and molecular targeted therapies. For anyone tracking the global state of the field, it is the next major congress on the 2026 calendar.

3. ACCC National Oncology Conference

October 2026

The Association of Cancer Care Centers hosts its National Oncology Conference for the clinicians, administrators, advanced practice providers, and patient navigators who run cancer care centers day to day. The program centers on care delivery, health equity, and the operational realities of community oncology, and it presents the ACCC Innovator Awards for programs advancing cancer care delivery. It is the most practical gathering for teams whose work depends on adoption inside community cancer programs.

4. San Antonio Breast Cancer Symposium

December 8-11, 2026 | San Antonio, TX

The San Antonio Breast Cancer Symposium is the premier meeting dedicated to breast cancer, expecting more than 10,000 attendees from over 105 countries. Its program spans clinical, translational, and basic research across medical, surgical, gynecologic, and radiation oncology, with patient advocates serving as speakers and panelists throughout. For any team working in breast cancer, the data presented here sets the agenda for the year that follows.

5. ASH Annual Meeting

December 12-15, 2026 | New Orleans, LA

The 68th American Society of Hematology Annual Meeting and Exposition is the definitive gathering for blood cancers and hematologic malignancies. It brings together researchers and clinicians around the latest clinical data in leukemia, lymphoma, myeloma, and related diseases, and it consistently features the field’s most significant advances. For teams in hematology and immuno-oncology, ASH closes the scientific year.

6. AACR Annual Meeting

April 2-7, 2027 | Orlando, FL

The Annual Meeting of the American Association for Cancer Research is the largest gathering for cancer research professionals, drawing roughly 22,000 scientists, clinicians, and patient advocates. Its core topics include early-stage clinical research, precision oncology, and the discovery science that feeds the treatment pipeline years before therapies reach patients. The 2026 meeting has concluded; AACR returns April 2-7, 2027, in Orlando.

7. ASCO Annual Meeting

June 4-8, 2027 | Chicago, IL

The American Society of Clinical Oncology Annual Meeting is the largest event in clinical oncology, drawing more than 40,000 professionals from over 100 countries across more than 200 sessions. ASCO is focused on improving cancer outcomes worldwide, and its program regularly delivers practice-changing data across tumor types, including advanced non-small cell lung cancer. The 2026 meeting has concluded; ASCO 2027 runs June 4-8, 2027, in Chicago. The data presented here shapes prescribing behavior for years afterward.

Building Your 2026 Oncology Conference Calendar

The right calendar depends on the work. For broad scientific advancement, AACR, ASCO, and ESMO anchor the year. For disease-specific depth, the San Antonio Breast Cancer Symposium and the ASH Annual Meeting go deep on breast cancer and hematology. For community care delivery and multidisciplinary care, the ACCC National Oncology Conference is the fit. And for adoption, formulary access, and the business of cancer care, the THMA Oncology Forum puts the health system decision-makers in the room. The strongest presence spans both the science and the delivery of oncology care across 2026 and into 2027.