Crowborough is the largest inland town in East Sussex, United Kingdom. It is the former home of Sir Arthur Conan Doyle, the famous author of the Sherlock Holmes novels.

It is built on a hill, and is home to the Caves of Crowborough , a network of underground chambers (currently closed to the public).

Also home of the English Grand Lodge for Europe and Africa of the Rosicrucian Order, AMORC.