The Hoo Peninsula is a peninsula in Kent, England, separating the estuaries of the rivers Thames and Medway. It is dominated by a line of chalk, clay and sand hills, surrounded by an extensive area of marshland composed of alluvial silt. The name Hoo is a Saxon word believed to mean 'spur of land' or refers to the 'distinct heel-shape of the ridge of hills' through Hoo. Hoo features in the Domesday Book. The peninsula is home to internationally and nationally protected wildlife sites as well as industrial facilities and energy industries.

Hoo St Werburgh, commonly known as Hoo, is a large village and civil parish in the Medway district of Kent, England. It is one of several villages on the Hoo Peninsula to bear the name Hoo, a Saxon word believed to mean "spur of land" or to refer to the "distinct heel-shape of the ridge of hills" through the settlement. Hoo features in Domesday Book, and had a population of 7,356 at the 2001 census, rising to 8,945 at the 2011 census. The civil parish includes Chattenden to the west.