This study seeks to define the types of headache and the sex and age distribution, of headache patients aged 65 and older. A computer search was performed of outpatients with a diagnosis of headache or temporal arteritis seen during 1988 at the Cleveland Clinic Foundation. Of over 120,000 outpatients treated at the clinic 9,950 had a diagnosis of headache; of these, 359 were 65 or older. We found that, compared with younger patients, older headache patients had more tension headache and less migraine headache. In our population, temporal arteritis occurred with the same frequency as migraine, and in patients with a similar demographic profile.