OBJECTIVES:  The present study aimed to evaluate the knowledge among hypertensive patients. METHODS:  A questionnaire based descriptive, cross-sectional study was conducted in the outpatient setting of Benazir Bhutto hospital Rawalpindi, Sir Ganga Ram hospital Lahore, Nishtar hospital Multan and Bahawal Victoria hospital in Bahawalpur, Pakistan. Knowledge regarding hypertension was assessed by using Hypertension Fact Questionnaire. Statistical package for social sciences (SPSS) version 20.0 was used to analyze data. Descriptive statistics was used to summarize data and chi square test was used to assess the association between categorical and dependent variable. Non parametric tests (Mann Whitney U test and Kruskal Wallis test) were used to find statistical difference in the scores based on categorical variable. RESULTS:  Among the 340 participants, mean age (SD) was 50.25 (11.49), with 60.6% of females dominating the entire cohort. Majority of the participants (73.6%) belonged to urban area. About 35.6% had HTN for more than 5 years, 53.5% had family history of hypertension and 53.2% had hypertension along with co-morbidity. The mean score of hypertension knowledge was 8.43+3.44. The result of the study demonstrated that hypertensive patients have average knowledge. CONCLUSIONS:  The current study findings revealed the importance of educational programs to increase the awareness of the patients regarding the importance of lifestyle modifications and medication for control of disease.