Fort Gilkicker is a historic Palmerston fort built at the eastern end of Stokes Bay, Gosport, Hampshire to dominate the key anchorage of Spithead. It was erected between 1863 and 1871 as a semi-circular arc with 22 casemates, to be armed with 5 12" guns, 17 10" guns and 5 9" guns. The actual installed armament rather differed from this. In 1902 the RML guns were replaced by 2 9.2" and 2 6" BL guns, and before the First World War the walls were further strengthened with substantial earthwork embankments.
Currently the fort is in the ownership of Hampshire County Council. It is inaccessible, as various plans come and go to convert the site to housing with an attached museum. It is on the Buildings at Risk Register, and support is being sought for its conservation and for an alternative use.