Background: Adolescents are in the transition phase between childhood and adulthood. Their mental health influences many aspects in their life as they go through many physical and emotional changes. Adolescent mental health is harmed by changes in emotional and physical state, as well as increased academic pressure. This study aimed to assess academic stress and its associated factors among adolescents in rural Nepal. Methods: A community-based cross-sectional survey was conducted among 424 adolescents residing in Karnali Province, Nepal. Academic stress was measured using Student Assessing Academic Stress. Multivariate logistic regression analysis was used to examine associated factors at the significance level of 0.05. Results: Of the total students, 19.8% had moderate academic stress and 2.4% of them had high academic stress. Female students had thrice higher odds of having academic stress as compared to male students (Adjusted Odds Ratio:3.47; 95% Confidence Interval:1.91to 6.31, p-value: