This study examined smoking intensity among secondary school adolescent smokers. A total of 800 students, made up of 685 males and 115 females who have at least tasted a cigarette once, from twenty secondary schools (5 private and 15 public secondary schools) in Benin City, Nigeria participated in the study. A questionnaire was used in collecting data that were analyzed in this study. The questionnaire consisted of 7 sections: the demographic variables, Smoking stages, delinquency, alcohol use, school connectedness, family connectedness and peer smoking status. Two out of the three hypotheses tested were supported. Result of the multiple regression analysis indicated that delinquency and parents' smoking status independently predict smoking initiation, while depression was not found to initiate smoking among adolescents. Adolescents' whose parents smoke and had a strong family connectedness were found to smoke more during the addictive stage than those whose parents do not smoke. Female smokers were found to smoke more at initiation stage as a result of peer pressure and school connectedness. Males were found not to have greater smoking intensity as a result of peer pressure and school connectedness. Based on the findings of this study, it was recommended that the future of a successful treatment program by therapists for smokers lies heavily on knowing and identifying the stage of smoking the individual is, and how intense the individual's smoking level. This no doubt would help the therapists in tailoring specific treatment for specific individuals. (Contains 3 tables.)