We described a population-based study of the epidemiology of herpes zoster in military personnel of Korea. A total of 132 cases of herpes zoster were ascertained from May 2004 to April 2005. The most common site of involvement was thoracic area (55%). The annual incidence, based on 132 cases in about 80,000 person-years, was 165 per 100,000 person (95% CI, 138-196). It is noted that herpes zoster occurred frequently in otherwise healthy military personnel.