Kingston by Sea, also known as Kingston Buci, Kingston Bucii or simply Kingston, is a small area in the Adur district of West Sussex, England. Although it is now part of a continuous urban area, its origins lay in an ancient village and parish church between Southwick to the east, Shoreham-by-Sea to the west and the mouth of the River Adur to the south. St Julian's Church survives, and its parish perpetuates the ancient "Kingston Buci" name.