Continued smoking at the time of a cancer diagnosis can severely impact the efficacy of cancer patient treatment and survival. The time of diagnosis can serve as a "teachable moment" for smoking cessation education, since patients may be receptive to discussions about quitting. Caregivers may have a pivotal role in supporting patients with their cessation efforts. The purpose of this study was to identify the smoking cessation informational needs of cancer patients and their caregivers. A needs assessment survey was administered to both patients and caregivers that assessed information needs across five domains: (1) General Information and Support; (2) Smoking, Health and Disease; (3) Relationships; (4) Testimonials; (5) Interventions. Mean importance scores were determined based on the proportion of respondents who ranked how important individual items were within the broader domains. Forty patients and twenty-two caregivers completed the survey. Among patients, the mean age was 61 years, with 35% diagnosed with a head and neck malignancy and 62% reporting as current smokers. Among caregivers, the mean age was 58 years, with 81% reporting to be the patient's immediate family member and 50% as current smokers. The General Information and Support domain was rated as the most important domain for both cancer patients and caregivers. The top preferred modality for receiving smoking cessation education across all domains was pamphlets for both groups. This study identifies the key informational elements that should be considered in the development of smoking cessation resources to meet the informational needs of cancer patients and caregivers.