Background Hypertension is a major public health threat affecting adults worldwide. The low hypertension management knowledge causes uncontrolled high blood pressure and it’s a complication. It requires patients with uncontrolled hypertension to increase adherence to either pharmacological therapy or nonpharmacological therapy aimed at achieving normal blood pressure. Purpose The purpose of this study was to examine the effectiveness of a short-term educational program on hypertension management related knowledge and attitude among uncontrolled hypertension patients in Malang, Indonesia. Methods The research design used a Quasi-Experimental study with the design of one group pre-post-test. The participants were 41 uncontrolled hypertension patients chosen by purposive sampling at the Ciptomulyo Public Health Center. The questionnaires were used to collect the data. The Hypertension Knowledge-Level Scale (HK-LS) questionnaire was used to determine the knowledge of uncontrolled hypertension patients. KAP questionnaire was used to determine the attitude of the participants. The data were analyzed statistically using the Wilcoxon Signed Rank Test. Results The majority of respondents were aged 55–65 (54%), female (83%), housewife (76%), graduated elementary school (71%), and long suffered from hypertension >1 year (68%). The result showed that the provision of the educational program increases knowledge (p = 0,000) and attitude (p = 0,008) of patients on the management of hypertension. Conclusion Health education could improve hypertension management knowledge and attitude among uncontrolled hypertension in the rural area. Furthermore, Health providers should consider giving the education among uncontrolled hypertension.