Background: The prevalence in the Lebanese general population of cigarette and waterpipe smoking, alcohol drinking and internet use seems to be increasing lately. So far, no study was done relating the above to attachment styles in Lebanese adolescents. Consequently, the objective of our study was to assess the relationship between attachment styles (secure, preoccupied, fearful, and dismissing) and addictions (cigarettes, water pipes, alcohol, and internet) among this population. Methods: It is a cross-sectional study that took place between January and May 2019. Two thousand questionnaires were distributed out of which 1810 (90.5%) were completed and collected back. A proportionate random sample of schools from all Lebanese Mohafazat was used as recruitment method. Results: A secure attachment style was significantly associated with lower addiction to alcohol, cigarette, and waterpipe, whereas insecure attachment styles (preoccupied, dismissing and fearful) were significantly associated with higher addiction to cigarette, waterpipe, alcohol, and internet. Conclusion: Lebanese adolescents with insecure attachment had higher rates of addiction to cigarette, waterpipe, alcohol, and internet. They should be closely monitored in order to reduce the risk of future substance use disorder and/or behavioral addiction development.