The purpose of this study was to examine the prevalence of cigarette smoking and to explore its relationship with individual, family, school, and psychological factors among Korean adolescents. As part of the Korean Institute for Health and Social Affairs' Adolescent Health Survey, 5,209 eighth graders and 4,677 eleventh graders from 70 junior and senior high schools completed a self-administered questionnaire during school hours in 1989. Current prevalence of cigarette smoking was 8.45% (15.43% of boys and 1.28% of girls). Smoking prevalence increased with age among boys. Based on logistic regression analyses, perceived peer use was most strongly associated with smoking status (OR = 9.97 for boys; and 68.27 for girls). Academic stress, grade, and type of school were also associated with smoking status for both boys and girls. In addition, mother's smoking, birth order, and urbanity were associated with smoking status for boys. Implications of the results for prevention efforts to inhibit the onset of cigarette smoking among Korean adolescents are discussed.