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World Health Organization (WHO) hypertension is the leading cause of premature death worldwide. Changes in dietary patterns have occurred almost all over the world, both in developed and developing countries. Based on a preliminary study conducted at Posbindu Semanan 1 Jakarta on August 4, 2024, researchers interviewed elderly people with hypertension, elderly people still consume a lot of foods containing excess sodium (salt), salted fish, smoking, consuming caffeine, stress, and staying up late. All of these factors cause some respondents to experience hypertension. This study is a quantitative study with a cross-sectional analytical survey design. The population is the elderly living in RW.006, Semanan Village, in the working area of ​​UPT Puskesmas Semanan 1. The sampling technique for this study was nonprobability sampling with a purposive sampling method. The results showed that the majority of elderly people aged <60 were 21 (52.5%), the majority of elderly people were female as many as 27 (67.5%), and the majority of elderly people had elementary school education as many as 23 (57.5%). The results of the identification of the majority of elderly people with good knowledge were 23 (57.5%), the majority of elderly people experienced hypertension as many as 27 (67.5%). The results of the bivariate analysis showed a relationship between elderly knowledge about the food consumed and the incidence of hypertension, the majority of elderly people with poor knowledge were 15 (88.2). The relationship between elderly knowledge about the food consumed and the incidence of hypertension p-value 0.039 <0.05. The conclusion is that there is a relationship between knowledge and the behavior of food consumed and the incidence of hypertension.