Patients with cancer frequently utilize complementary and alternative medicine (CAM); prior to this, many seek information about these therapies online. Little is known about the quality of this web-based consumer health information (CHI). The present study aimed to address this paucity of research by evaluating the quality of websites containing information on CAM treatments for cancer. Six unique search terms were entered into Google across four English-speaking countries. The first 20 results of each search were assessed and included if they contained CAM consumer health information for the treatment and/or management of cancer. Eligible websites were assessed using the 16-item DISCERN instrument, designed to evaluate information quality. Of the 480 identified websites, 387 were duplicates, and 53 fit the eligibility criteria and were assessed using the DISCERN instrument. Mean summed DISCERN scores across all websites was 53.08 (SD = 12.75), and mean scores of the overall quality of each website was 3.22 (SD = 0.80). Website CHI quality on CAM therapies for cancer were generally acceptable. Several website quality issues were identified, including a lack of transparency surrounding references, areas of uncertainty, consequences of foregoing treatment, and treatment impacts on quality of life.