Cliffe is a village and former civil parish, now in the parish of Cliffe and Cliffe Woods, in the borough of Medway in the ceremonial county of Kent, England. It is on the Hoo Peninsula, reached from the Medway Towns by a three-mile (4.8 km) journey along the B2000 road. Situated upon a low chalk escarpment overlooking the Thames marshes, Cliffe offers views of Southend-on-Sea and London. In 774 Offa, King of Mercia, built a rustic wooden church dedicated to St Helen, a popular Mercian saint who was by legend the daughter of Coel of Colchester. Cliffe is cited in early records as having been called Clive and Cliffe-at-Hoo. In 1961 the parish had a population of 2239. On 1 April 1997 the parish was abolished to form "Cliffe & Cliiffe Woods", part also went to and Frindsbury Extra.

Medway is borough and unitary authority area in Kent, South East England. It had a population of 278,016 in 2019. The unitary authority was formed in 1998, when the boroughs of Rochester-upon-Medway and Gillingham were merged to form Medway Towns. The borough is governed by Medway Council, a unitary authority which is independent of Kent County Council, but remains part of the ceremonial county of Kent.