Beachy Head is a chalk headland on the south coast of England, close to the town of Eastbourne in the county of East Sussex, immediately east of the Seven Sisters. The cliff there is the highest chalk sea cliff in Britain, rising to 162 m (530 ft) above sea level. The peak allows views of the south east coast from Dungeness to the east, to Selsey Bill in the west. Its height has also made it one of the most notorious suicide spots in the world.

The chalk was formed in the Late Cretaceous period, between 65 and 100 million years ago, when the area was under the sea. During the Cenozoic Era the chalk was uplifted (see Cenozoic Era). When the last Ice Age ended, sea levels rose and the English Channel formed, cutting into the chalk to form the dramatic cliffs along the Sussex coast.