Purpose: The purpose of this study were to compare general characteristic of high school girls according to menarcheal age and to investigate the factors associated with the menarcheal age of high school girls. Methods: This study utilized the data of the 2013 Korean Youth Risk Behavior Web-based Survey (KYRBWS). The sample included 18,077 high school girls who experienced menarche. The questionnaires used for this study assessed menacheal age, grade, place of residence, family affluence, height, weight, diet pattern, physical activity, sleep duration, and stress level. Data was analyzed using the complex sample analysis (${chi}^2$-test, ANOVA and multiple regression analysis). Results: Higher BMI, frequent vegetable consumption, short sleep duration, and higher stress level were associated with an earlier menarcheal age among high school girls. Conclusion: The findings of this study indicate intervention strategies to control the timing of menarche.