Background: Cancer is a slowly progressive disease resulting from modifiable and non-modifiable factors. There are three crucial modifiable lifestyle risk factors: passive smoking, ultraviolet radiation, and processed meat classified by the International Agency for Research on Cancer as group A carcinogens. Aim: To assess awareness, practice, and attitude regarding passive smoking, ultraviolet radiation, and processed meat of Saudi adult individuals in Al-Majma’ah city, Saudi Arabia. Methodology: This is a descriptive cross-sectional community-based study in Al-Majma’ah city. A sample of 502 Saudi adult individuals was randomly selected from public places as well by using an online questionnaire. Data was entered and analysed using SPSS version 25. Results: Awareness and practice levels regarding the three potential carcinogens were graded as excellent, good, and poor. The Awareness section’s respondents’ scores were (57.37%, 33.47%, and 9.16%) respectively, while in the practice section (38%, 51%, and 11%). The highest positive attitude percentage was for passive smoking (n= 365, 72.7%). Conclusion: Generally, participants had an acceptable level of awareness, practice, and attitude. However, there are some areas in which the respondents’ level was relatively low, where most of the participants had inadequate awareness and practice regarding ultraviolet radiation hazards. Moreover, approximately half of the respondents showed a negative attitude towards processed meat consumption