PURPOSE: To determine the incidence and clinical characteristics of ocular adnexaltumors in Olmsted County, Minnesota. METHODS: Retrospective population-based cohort study of all patients residing in Olmsted County, Minnesota diagnosed with any ocular tumor from January 1, 2006, to December 31, 2015. The medical records of all patients with an incident diagnosis of any ocular adnexal tumor were reviewed using the Rochester Epidemiology Project medical record linkage system for patient demographics, tumor type, and histopathologic confirmation. Incidence rates were calculated per 100,000 person-years. Poisson regression analysis was used to analyze changes in incidence over time. RESULTS: There were 717 patients diagnosed with ocular adnexal tumors during the 10-year study period, yielding an age- and sex-adjusted incidence rate of 59.7 per 100,000 (95% CI 55.4 to 64.0, CONCLUSIONS: In a population-based setting, most ocular adnexal tumors were benign eyelid lesions. Understanding the epidemiology of ocular adnexal tumors is important to aid providers in diagnosing and facilitating appropriate referrals of potentially vision- and life-threatening malignancies.