Background: A geographic tongue is an inflammatory lesion that is on the tongue, is has no tendency to change to be malignant and has benign condition. These lesions are generally located on the lateral and dorsal surfaces of the tongue. Lesions on the geographic tongue is found on the papillary atrophy or depapillation of the filiform papilla which is capable of changing sensations so that it is often symptomatic. Some researchers say that genetic or hereditary factors play a major role in this lesion. Other predisposing factors also support the occurrence of these disorders such as nutritional deficiencies, stress, and so on. The purpose of this study was to describe the prevalence of geographic tongue in dental students at the Muhammadiyah University of Yogyakarta in the academic year 2018/2019. Research Methods: This type of research was descriptive observation with cross sectional research design. The sample used was all UMY Dentistry students who fulfill the inclusion criteria with a total of 368 students. Results: The prevalence of 368 Dentistry students in UMY academic year 2018/2019 who had geographic tongue were 4.9%. Females had prevalence 72.2%, while in the oblate and wavy patterns it were 16.7%. 77.8% of sample did not complain about pain. Conclusion:The prevalence of geographic tongue is most of samples found in female. Oblate and wavy wer the most common pattern found. Most of samples did not complain about the pain .