Introduction: By the age of 14 years, approximately half of the mental disorders set in, and the burden of mental health disorders is higher among those living in urban areas and belonging to poor socio-economic strata. Hence, the aim was to assess Mental Health Literacy, which includes recognition, help seeking and its barrier, first aid intention beliefs about prevention strategies, causes, treatment, stigmatizing attitudes, and social distance related to mental health. Methodology: A cross-sectional vignette-based study was conducted among late adolescents (15-19 years). The self-administeredvignette-based questionnaire was used and vignettes were randomized among participants. MHL components such as recognition, help-seeking,barrier, first aid intentions, beliefs about prevention, causes, and treatment outcome along with stigma and social distancing related to mental disorders were measured. Correct labelling of the disorder was taken as the outcome of the study and multivariable regression was done. Result: Of the 182 respondents, the percentage of mental health literacy among the respondents was very low, only 21.88% identified depression, and 1.16% identified schizophrenia. Study findings indicate that adolescents prefer to reach out more to informal sources such as close family members (42% overall). Adolescents had positive attitudes regarding most of the prevention strategies but beliefs about causes, treatment, and stigma were mostly negative. Household per month income and help seeking were found to be associated with correct recognition of the disorder. Conclusion: There is a need to develop MHL among adolescents as well as among their parents as they are the preferred source of help seeking. Also school-based health literacy programs, public awareness using IEC materials and specifically targeted advocacy should be strengthened to decrease taboo and stigma among society and to reduce the treatment gap.