The Canadian Cancer Society (CCS) is a national, community-based organization of volunteers whose mission is the eradication of cancer and the enhancement of the quality of life of people living with cancer.

They focus their work in 5 areas: research, advocacy, prevention, information and support. The Canadian Cancer Society consists of: 11 provincial and territorial divisions, approximately 220,000 volunteers and approximately 550 full-time staff members.

Local efforts are coordinated through divisional offices. Each province is a division of the Canadian Cancer Society with a divisional board of directors, chaired by a volunteer divisional president.

Public accountability for the organization rests at the national level. Nationally, efforts are led by a volunteer board of directors, made up of 18 representatives from across Canada.

CCS has been a full UICC member since 1964.