The normal blood pressure range for adults, including elderly adults, is 120/80 or below, according to the National Institute on Aging. In elderly people, systolic readings are often greater than 140 with a diastolic reading of less than 90; this condition, known as systolic hypertension, is common with age.
Aging is a risk factor to development of high blood pressure, notes the National Institute on Aging. Other factors include gender, with more men than women developing the condition prior to age 55. Women are more likely to develop high blood pressure after menopause. Family history and race are also risk factors for the condition. Changes in the heart that occur with age often lead to high blood pressure.