Rare and less common cancers encompass a broad and diverse group of cancers. Rare cancers are defined as a type of cancer with less than 6 diagnoses per 100,000 people per year. There are hundreds of types of rare cancers, including sarcomas, reproductive cancers, head and neck, and many types of blood cancers. To address these challenges, Cancer Australia has engaged Rare Cancers Australia to lead the development of the first Optimal Care Pathway (OCP) for People with Rare and Less Common Cancers.