: The chronic nature of heart failure requires long-lasting consumption of various medications. Despite the therapeutic benefits of heart failure medications, about 50% of patients with heart failure don't adequately adhere to their medications as prescribed globally. This study aimed to determine medication adherence levels among Jordanians with heart failure and its influencing factors. : A cross-sectional study was conducted among 164 patients with heart failure attending cardiac clinics in the north of Jordan. The Medication Adherence Scale was used to measure medication adherence. : Overall, 33.5% of patients had high adherence, and 47% had partial to poor adherence. The proportion of patients with good to high adherence was significantly higher among patients younger than 60 years, having >high school level of education, being married, living with somebody, and having insurance. : Patient-centered approach, targeting age, level of education, marital status, and health insurance coverage, should be developed using evidence-based guidelines to enhance adherence to medication and health outcomes in Jordanian patients with heart failure. The development and implementation of new and feasible strategies, particularly suited to Jordan's healthcare system capabilities, is important to improve medication adherence.