Everton Lock-Up, sometimes referenced by one of its nicknames such as Prince Rupert's Tower or Prince Rupert's Castle, is a village lock-up located on Everton Brow in Everton, Liverpool. The 18th-century structure is one of two Georgian lock-ups that still survive in Liverpool; the other is in Wavertree. It is famous for being the centre-piece of the crest of Everton F.C.

A village lock-up is a historic building once used for the temporary detention of people in England and Wales, mostly where official prisons or criminal courts were beyond easy walking distance. Lockups were often used for the confinement of drunks, who were usually released the next day, or to hold people being brought before the local magistrate. The archetypal form comprises a small room with a single door and a narrow slit window, grating or holes. Most lock-ups feature a tiled or stone-built dome or spire as a roof and are built from brick, stone and/or timber.