List of museums in East Sussex

This list of museums in East Sussex, England contains museums which are defined for this context as institutions (including nonprofit organizations, government entities, and private businesses) that collect and care for objects of cultural, artistic, scientific, or historical interest and make their collections or related exhibits available for public viewing. Also included are non-profit art galleries and university art galleries. Museums that exist only in cyberspace (i.e., virtual museums) are not included.

Defunct museums
Bentley Wildflower and Motor Museum is no longer operating, despite there being a ‘brown sign’ on the main road
 * Musgrave Museum, Eastbourne, life of St. Paul
 * Yesterday's World, Battle, closed in 2015