Abstract This study examined the influence of sexuality education on moral behavior of adolescents in Senior Secondary Schools in Wamakko Local Government, Sokoto State, Nigeria. The research specifically found out the influence of sex education awareness, sexuality education program and school support program on adolescents’ moral behavior. The population of the study was 2640. Samples of two hundred and forty three (243) students were selected from the total population. The instrument for data collection was a self-designed questionnaire titled; Influence of Sexuality Education on Moral Behavior of Adolescents in Senior Secondary Schools (ISEMBASSSQ).The data collected were analyzed using descriptive statistics (frequencies, percentages and mean) and Pearson correlation statistical tool for the inferential analysis. Findings from this study revealed that sex education awareness influence adolescents’ moral behavior through sexual messages in public areas, discussion of sex in the presence of children, making sexual jokes about adolescents and showing pornography to adolescence. Overall, there is moderate influence of sex education awareness on adolescents’ moral behavior (with overall mean of 2.15). Similarly, sexuality education program influence adolescents’ moral behavior through sex abstinence, responsible decision about sex, avoidance of unwanted pregnancies and the need for sex education program in school. Overall, there is high influence of sexuality education program on adolescents’ moral behavior (with overall mean of 3.02). Also, school support program influence adolescents’ moral behavior by allowing posters to be posted in schools, financial support for sexuality program, allocation of venue for sexuality program, giving school counselor the necessary support. Overall, there is a high influence of school support program on adolescents’ moral behavior (with overall mean of 2.99).The following recommendations were made, Sex education should be introduced into the curriculum of secondary school education. However, students at the junior secondary level should not be exposed to sex education as it might only increase their sexual libido, the government should work hand in hand with the individual schools in collaboration with the other non-governmental organizations in order to curb this problem. There is a need for improvement on budgetary funding from local government to schools. This is probably to provide the facilitation of the counselors when carrying out their Counseling programs to students.