Objective: This study aimed to assess the prevalence of hypertension and undiagnosed hypertension and its associated risk factors in people aged 18 to 75 years in the department of Santander, Colombia. Design and method: A community-based program was designed, and the first phase was carried from May to November 2023. Data was collected using a structured questionnaire. The questionnaire comprised demographic and socio-economic variables, behavioral measurements, history of raised blood pressure, co-morbidities, and physical measurements. Hypertension screening was performed by averaging three values obtained by an automated electronic monitor in three observations. Collected data were analyzed using JASP 0.17.2.1, and descriptive statistics like frequency, percentages, central tendency (mean) measures, and standard deviations were performed to describe study participants. Results: A total of 6305 adults were screened with a mean age of 57.3 years (SD 17.9), 64.25% were women. 3130 (54.3%) individuals were identified as hypertensive, of whom 76% reported a previous diagnosis, 89.5% were on pharmacological treatment, and 38.4% had blood pressure in the control range. Ninety-three percent of those with hypertension were part of the subsidized health system. Of the hypertensive participants, 44.5% were overweight or obese and 24.6% reported doing at least 150 minutes of physical activity per week. When asked about tobacco use, 17% of the hypertensive patients had history of smoking and 4.7% were active smokers. 101 subjects reported having had an acute myocardial infarction, 25 had a cerebrovascular event, 80 had heart failure, and 451 had been diagnosed with diabetes mellitus. Conclusions: Half of the Colombian adult population studied suffers from hypertension. A high percentage is on pharmacological treatment, but control rates are low. This highlights the importance of new strategies to identify and improve the factors that influence the adequate control of hypertension.