OBJECTIVES: Adolescents in Indonesia have limited access to sexuality education, resulting in increased risk of sexually transmitted infections and unplanned pregnancies. This study aimed to understand psychosocial correlates of sexual abstinence intentions to inform future sexuality education. METHODS: Data were collected in 79 secondary schools among 2315 students, aged 14-20 years, in Jambi, Lampung, Jakarta and Bali. A self-completed questionnaire measured attitudes, risk perception, subjective norms, perceived behavioural control and intentions towards sexual abstinence. RESULTS: Significant associations with intention to abstain from sexual intercourse were found for experience with sexual intercourse, perceived behavioural control, attitude and subjective norms of peers and parents, explaining 31% of the variance in abstinence intention. CONCLUSIONS: To promote adolescents' informed sexual decision-making, sexuality education programmes in Indonesia may benefit from addressing past sexual behaviour and perceived behavioural control, subjective norms of peers and attitudes.