Aim: To evaluate the awareness about glaucoma among adults and its related health problems in Jeddah, Western region of Saudi Arabia and to assess the relationship between the awareness and knowledge about glaucoma across the socio-demographic characteristics. This will help to develop educational and screening programs of glaucoma which could help in early detection and diagnosis of the disease therefore reducing its sight threatening outcomes. Methods: A descriptive, cross-sectional study which included a sample of 608 adults in June 2019. Participants took part filling in the online multiple choice sociodemographic and glaucoma awareness questionnaire. Results: The mean age of the participants was 28.3 years ±11.4 with (59.2%) males and (40.8%) females. The majority of the respondents 70.9% were single and the majority had a bachelor's degree. Overall, 66.3% of the participants had knowledge about glaucoma, whereas 33.7% had no previous knowledge about glaucoma. Significant association between higher educational level and awareness of glaucoma was (P= 0.024). Females and age group (?40) also showed significant associations with glaucoma awareness (P=