© 2014, Medical Association of Thailand. All rights reserved. Objective: To report the histopathological diagnosis of eyelid tumors and to study the prevalence of eyelid tumors in Chiang Mai University Hospital, Chiang Mai, Thailand. Material and Method: A retrospective review of medical and pathological records of patients diagnosed as eyelid tumor that underwent histopathological biopsy between January 2007 and December 2013 in Chiang Mai University Hospital was done. Results: Three hundred sixteen cases of eyelid tumors were reviewed. The mean age at diagnosis was 54.2±19.6 years (range 1 month-99 years), women were 59.5% (n = 188) and men 40.5% (n = 128). The tumor sites were left lower eyelid (27.5%), right upper eyelid (24.4%), right lower eyelid (21.2%), and left upper eyelid (18.7%). There were 204 (64.6%) benign tumors and 112 (35.4%) malignant tumors. Nevi were the most common in benign group (16.4%) and basal cell carcinoma was the most common eyelid malignancy (18.0%). Conclusion: The most common histopathological diagnosis for benign eyelid tumor was nevus, while the most common malignant eyelid tumor was basal cell carcinoma at Chiang Mai University Hospital.