Background: Nasal bleeding, epistaxis, is a common emergency. Few Saudi studies exist on epistaxis awareness and first aid management. We aimed to assess knowledge and attitude of adults in Najran, Saudi Arabia towards epistaxis first aid management, as well as their association with sociodemographic factors.Methods: A cross-sectional web-based survey was carried out involving general adults of Najran, Saudi Arabia, using a snowball sampling method. A pretested questionnaire was utilized for data collection. Knowledge and attitude scores were categorized as good/positive or poor/negative. Both descriptive and inferential statistics were carried out with odds ratio (OR), 95% confidence intervals (CIs), and logistic regression analysis to investigate factors associated with knowledge and attitude towards epistaxis first aid management using SPSS Software.Results: The study included 518 participants with 58.9% experienced nosebleeds. Common causes were hypertension (24.5%) and nose injuries (23.7%). Factors as nasal dryness, blood thinner use, and tumors/nasal polyps were also identified. Around 60.2% believed first aid was necessary and 59.5% had good knowledge about epistaxis first aid management. Participants with university/higher education, employed in health sector, and with previous experience with nosebleed were more knowledgeable, more likely to have positive attitudes, and showed significantly higher ORs for knowledge and attitude scores compared to others.Conclusion: The study showed fair knowledge and attitude of Najran adults towards epistaxis first aid management with sociodemographic variables showing varying associations. Educational initiatives are needed especially for those with lower education, non-health sectors, and not experienced nosebleeds, to improve public first aid knowledge and attitudes.Keywords: Epistaxis; Knowledge; Attitude; First aid management; Saudi Arabia