IntroductionE-cigarettes smoking is a global health concern due to its associated risks and unexpected rise in e-cigarette smoking among adults and nonsmokers. This study aims to investigate gender differences in e-cigarette knowledge, attitude, and practice among adults in Bahrain.MethodsThe data was collected using an online questionnaire covering demographics, knowledge, attitude, and practice. Data were analyzed using SPSS software, reporting mean and SD for continuous variables, frequencies, and percentages for categorical variables. A chi-square test was conducted to assess the association between variables and gender with a significance level of p < 0.05.ResultsA total of 555 participants completed the questionnaire, with the majority being females (66.8%), with a mean age of 31 (SD 8.5). Among respondents, 23.2% were smokers with a higher percentage of male smokers 58.7% compared to female smokers 5.7%. E-cigarette smoking was prevalent among 18% of participants, with 86% of them being male e-cigarette smokers compared to 14% of female e-cigarette smokers. The chi-square test showed that there was statistical significance between males and females when it comes to knowledge and attitudes toward e-cigarette smoking (p = 0.000). Males have inadequate knowledge and positive attitudes toward e-cigarette smoking compared to females. There was no statistical difference in the analysis of practice between both genders.ConclusionE-cigarette smoking is very prevalent among adults in Bahrain, especially among males. Educational interventions and robust laws and policies should be implemented to address this issue and contribute to improving community health.