To evaluate the proportions of current cigarette smokers (CCS) and current narghile smokers (CNS) as well as previous cigarette smokers (PCS) and previous narghile smokers (PNS) and to assess smoking knowledge and attitudes toward supporting smoking ban or cessation among previous compared with current smokers. This cross-sectional study took place between May and December 2018, and enrolled a sample of 1598 exclusive cigarette smokers (ECS) and 2091 exclusive narghile smokers (ENS), representative of all Lebanese governorates. A questionnaire designed specifically for this study was used to collect data. Among ECS, 45.2% were CCS and 54.8% were PCS. Among ENS, 83.5% were CNS and 16.5% were PNS. Higher age (adjusted odds ratio (aOR) (95% confidence interval (CI)) = 1.02 (1.01; 1.03)), higher knowledge (1.05 (1.02; 1.08)), and attitude scores (1.11(1.09; 1.13)) were significantly associated with higher odds of being PCS. Higher age (1.02 (1.01; 1.03)), being employed (1.32 (1.004; 1.72)), higher knowledge (1.04 (1.02; 1.07)), and attitude scores (1.09 (1.07; 1.12)) were significantly associated with higher odds of being PNS. Previous smokers have higher knowledge and better attitude toward supporting smoking cessation compared with current smokers. A better knowledge along with effective interventions, might lead to a positive attitude toward supporting smoking ban or smoking cessation among the general population.