Sarcopenia has been defined as the considerable loss of skeletal muscle mass and strength that results in frailty in the elderly.Because muscle tissue plays diverse important roles in human, sarcopenia presents many negative health-related consequences including impaired energy homeostasis, falls and cardiovascular disease, and subsequently higher mortality.It is becoming evident that sarcopenia has a negative impact on the healthy life of the elderly.The European Working Group on Sarcopenia, the International Working Group on Sarcopenia and the Asian Working Group on Sarcopenia have released position statement regarding sarcopenia, and more recently the Foundation for the National Institutes of Health Sarcopenia Project has provided a new guideline for assessment of sarcopenia.At this time, there have been several data delineating the status of sarcopenia in Korea.This review focuses on largescale cohorts that assessed sarcopenia and highlights the controversies surrounding the clinical definition and prevalence of sarcopenia in Korea.