Introduction: Depression is the most common psychological sequelae in cancer patients. It is challenging to diagnose depression in cancer patients. Furthermore, the presentation is influenced by the patients’ cultural background. Objectives: This literature review aims to determine the prevalence of depression in cancer patients across regions of different cultural background. Methods: A literature search was undertaken by using Pubmed electronic database. Studies were included in this review if they (a) examined the prevalence of depression in cancer patients and (b) published in English peer-review journal between 2000 and 2009. Results: A total of 59 studies from 21 countries were reviewed and summarised. The prevalence of depression in cancer patients ranged from 3% to 72%. Studies from Asia reported the lowest prevalence (3-39%) and Europe reported the highest prevalence (7-72%). Conclusion: Cultural influence may play a role in the prevalent difference of depression in cancer patients. Somatization and stigmatization are suggested as the possible reasons of lower prevalence of depression in Asia region. The biopsychiatric model of mental illness and western psychologization explain the higher prevalence in Western region. Future research on the cross-cultural variability in the presentation of depression in cancer patients is recommended.