The characteristics of all patients with humeral epicondylitis who presented over a two-year period in a group practice were examined to clarify the epidemiological features of this condition. In all 77 patients were seen. There was no observed difference in incidence between the sexes, lateral epicondylitis being more common than medial in both sexes. Medial epicondylitis is more common in the community than is generally recognized. Epicondylitis is a relapsing condition with a strong bias towards the 35-54 years age group. Analysis revealed no relationship between incidence and socioeconomic class.