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Background Prevalence of hypertension in adolescents increases. There are only few studies of hypertension prevalence and its association with fast food consumption and physical activity in Indonesian adolescent. Objective This study determine the blood pressure status and its association with fast food consumption and physical activity in adolescent Method. This cross sectional study was conducted during January and August 2018 in Senior High School in South Tangerang, Indonesia. 220 students were selected by proportional stratified random sampling. Blood pressure measurements were categorized as normal, prehypertension, or hypertension using the 2004 Fourth Report blood pressure screening recommendations. Fast food consumption was collected using Food Frequency Questionnaire and divided into often and rare. Physical activity was categorized using Baecke questionnaire into active and not active. Associations between fast food consumption and physical activity with blood pressure were determined using Chi Square test. Results Prevalence of prehypertension was 11.5% and hypertension was 12.0%. Fast food consumption and physical activity were not associated with prehypertension/hypertension (p value > 0.05). Conclusion Hypertension and prehypertension were highly prevalent in the studied adolescent. There were no associations between fast food consumption and physical activities with adolescent blood pressure.