Eastleigh is a railway town in Hampshire, England, and the main town in the Eastleigh (borough) which is part of Southampton Urban Area. The town lies between Southampton and Winchester, and is part of the South Hampshire conurbation. Eastleigh borough stretches from Netley on the banks of Southampton Water, the historic river villages of Hamble-le-Rice, Bursledon and Botley, Hampshire, the developing areas of Hedge End, West End, Hampshire, Fair Oak & Bishopstoke and the green residential belt of Chandler's Ford and Boyatt Wood. Eastleigh is home to many businesses, including a Factory owned by Prysmian (formerly the cables division of Pirelli).
The town lies on the River Itchen, Hampshire, one of England's premier chalk streams for fly fishing, a designated site of Special Scientific Interest due to its high quality habitats supporting a wide range of protected species including the threatened European water vole, on the River Itchen and Austropotamobius pallipes.