The Kingdom of Sussex or Kingdom of the South Saxons is a Saxon colony and later independent kingdom of the Saxons, on the south coast of England.

Its boundaries coincide in general with those of the earlier kingdom of the Regnenses and the later county of Sussex.

A large part of its territory is covered in early times by the Forest of Andred.

This forest according to the Anglo Saxon Chronicle is 120 miles wide and 30 miles deep (although probably closer to 90 miles wide).

It is inhabited by wolves, boars and possibly even bears.

It is so dense that even the Domesday Book did not record some of its settlements.

The South Saxons are ruled by the kings of Sussex.