The high maternal mortality and morbidity rate in Nigeria is a major concern for every stakeholder in the health sector and unsafe abortion is a major cause. As a remedy, it was suggested that active efforts to promote sexuality education and contraceptive use should be intensified among Nigerian adolescents. In this regard, we studied the level of contraceptive knowledge and use among adolescents in three secondary schools in Lagos between January to March 2010. Results showed that 5% of 1155 students with knowledge of contraception are users, 85% of sexually active respondents were non-users while condom is the most common contraceptive method used. Also, nearly 45% of respondents obtained knowledge about contraception from their parents. We believe that there is a need for aggressive advocacy on adolescent reproductive health (ARH) before initiation of sexual activity and dissemination of information on family planning methods among the teenage.