This paper explores adolescent girls' and young women's (AGYW) aspirations, factors that influence aspirations, and how their aspirations inform their sexual decision-making and behaviour. This study employed a qualitative design involving six participatory focus group discussions and 17 in-depth interviews with AGYW in - and out-of-school. Fieldwork was undertaken in rural and urban Tanzania. Thematic analysis was conducted using NVIVO software. Aspirations of AGYW's were categorised as short and long-term. Short-term aspirations were associated with the social status derived from obtaining trendy items such as nice clothing, or smart phones. Long-term aspirations included completing secondary education, having a professional job, being respected, getting married and having children. Aspirations were influenced by aspects of the social context, such as peers and structural factors that dictated what was acceptable for respectable AGYW. AGYW lacked the independent capabilities to meet long-term aspirations such as completing education. In pursuit of their short - and long-term aspirations, AGYW engaged in higher risk sexual behaviours such as transactional sex, age-disparate sex and condomless sex. AGYW's aspirations were important in determining their sexual decision making. Interventions should capitalise on AGYW's aspirations when addressing their SRH risks by finding innovative ways of engaging them based on their circumstances and aspirations.