OBJECTIVE: To identify the determinants and measure the trends in health facility-based deliveries and caesarean sections among married adolescent girls in Bangladesh. METHODS: In order to measure the trends in health facility-based deliveries and caesarean sections, Bangladesh Demographic Health Survey (BDHS) data sets were analysed (BDHS; 1993-1994, 1996-1997, 1999-2000, 2004, 2007, 2011). The BDHS 2011 data sets were analysed to identify the determinants of health facility-based deliveries and caesarean sections. A total of 2813 adolescent girls (aged 10-19 years) were included for analysis. Bivariate and multivariate analyses were performed. RESULTS: Health facility-based deliveries have continuously increased among adolescents in Bangladesh over the past two decades from 3% in 1993-1994 to 24.5% in 2011. Rates of population-based and facility-based caesarean sections have increased linearly among all age groups of women including adolescents. Although the country's overall (population-based) caesarean section rate among adolescents was within acceptable range (11.6%), a rate of nearly 50% health facility level caesarean sections among adolescent girls is alarming. Among adolescent girls, use of antenatal care (ANC) appeared to be the most important predictor of health facility-based delivery (OR: 4.04; 95% CI 2.73 to 5.99), whereas the wealth index appeared as the most important predictor of caesarean sections (OR: 5.7; 95% CI 2.74 to 12.1). CONCLUSIONS: Maternal health-related interventions should be more targeted towards adolescent girls in order to encourage them to access ANC and promote health facility-based delivery. Rising trends of caesarean sections require further investigation on indication and provider-client-related determinants of these interventions among adolescent girls in Bangladesh.