Background: Erectile Dysfunction (ED) is an important worldwide health issue that affects nearly half of men over the age of 40 years. It has a significant negative impact on the quality of life and life satisfaction of the affected individual as well as his partner. The primary objective of this study was to determine the prevalence of erectile dysfunction and its associated factors. Methods: This was a prospective and cross-sectional survey of Filipino adult patients seen at a Tertiary Hospital from April 2023 to September 2023. The instrument used was the International Index of Erectile Function (IIEF) Questionnaire. Comparison of characteristics by ED severity were performed using One Way ANOVA or Kruskal Wallis test for continuous variables, and Chi square or Fisher’s exact test for categorical variables. Multiple logistic regression analysis with backward elimination technique was utilized to identify the factors associated with ED. P values ≤0.05 were considered statistically significant. Results: A total of 106 men aged within 18-80 years, with mean age of 43.9 (±14.4) years, were included in the study. The prevalence of ED on this study was 10.4% among Filipino adult men with equal prevalence among <40 years and ≥40 years (p=0.075). Increasing waist circumference was associated with a 1.34 (OR = 1.13, p=0.004; 95% CI: 1.10-1.63) times increase in the odds of developing mild ED while hypertension was associated with an 82.677 (OR = 27.52, p=0.008; 95% CI: 3.17-2155.26) times increase in the odds of developing mild ED. Conclusion: One out of ten Filipinos have mild ED and the associated risk factors were hypertension and waist circumference. This study recommended to increase awareness among men, patients, and doctors around the country about the existence of ED problem and its consequence so that prevention can be advised and care can be adequately provided. Keywords: Erectile dysfunction, Hypertension, Waist Circumference, Prevalence, Factors Page 1 of 2