Waterlooville is a town located in the Borough of Havant in Hampshire, England. Situated approximately 6 miles (9.7 km) northeast of Portsmouth, it serves as the largest town within its borough and forms part of the South Hampshire conurbation.
The town developed around the historic A3 road connecting London to Portsmouth. According to the 2021 census, the Waterlooville built-up area had a population of 34,775. It is surrounded by several neighboring areas, including Purbrook, Blendworth, Cowplain, Lovedean, Clanfield, Catherington, Crookhorn, Denmead, Hambledon, Horndean, and Widley.