Objective To determine the control of systolic blood pressure (SBP) retrospectively according to the recommendations of the ESC/ESH-2018 guideline and its relationship with mortality in octogenarian patients with dementia. Patients and methods Preliminary, longitudinal, observational, retrospective study, including 65 patients ≥80 years with diagnosis of dementia and arterial hypertension admitted to a psychogeriatric unit during 2015. The main variables were SBP control according to the recommendations of the ESC/ESH-2018 guideline, considering desirable SBP (130–139 mmHg), undesirable SBP (suboptimal Results Mean age, 86.7 ± 4.31 years (63% women); severe functional dependence (Barthel index Conclusions The percentage of patients in treatment with suboptimal SBP was elevated especially in hypertensive patients without cardiovascular comorbidity. We found a trend for higher mortality in undesirable SBP groups compared to desirable SBP.