Avebury is the site of a large henge and several stone circles surrounding the village of Avebury in the English county of Wiltshire. It is one of the finest and largest Neolithic monuments in Europe, about 5,000 years old. 

Although older than the megalithic stages of Stonehenge 32 kilometres (20 mi) to the south, the two monuments are broadly contemporary overall. 

Avebury is roughly midway between the towns of Marlborough and Calne, just off the main A4 road on the northbound A4361 towards Wroughton.

The henge is a Scheduled Ancient Monument and a World Heritage Site.

Avebury is a National Trust property.