Background: Peer relationships are impacted by the diagnosis of childhood cancer. Children with cancer can feel isolation, such as bullying and lack of engagement, from their peers. As the rates of survival increase, one way to further learn about the experiences of childhood cancer is to reflect on the memories of adult survivors. This study examines adult survivors of childhood cancer's memories of their experiences with peers during their cancer. Method: Twenty-seven adult survivors (15 male, 12 female) of childhood cancer were recruited from Amazon Mechanical Turk, a crowdsourcing marketplace for survey distribution, and surveyed about their experiences with peers during childhood cancer. Using inductive thematic analysis, open-ended survey questions were analyzed. Results: Five main themes emerged, including age, perceptions of cancer, acts of kindness, peer responses, and limited peer engagement. Participants' memories included peers' lack of understanding about their diagnosis, prognosis, and treatment, positive and negative responses to their cancer diagnosis, acts of services and gifts from peers, and feelings of isolation during the cancer experience. Discussion: In the current study, adult survivors of childhood cancer had specific memories about how cancer impacted peer relationships. Such findings contribute to the evidence that children with cancer could benefit from psychosocial interventions, including education to peers about the diagnosis and the impact of diagnosis on peer relationships, peer engagement activities, and peer support groups.