Eastleigh is a local government district and borough in Hampshire, England, bordering Southampton. Its main town is Eastleigh. Other places include Bishopstoke, Hamble-le-Rice, Hedge End, Chandler's Ford, Fair Oak, and the Hamble Valley.
The current borough was formed on April 1, 1974 by the merger of the old borough of Eastleigh with part of Winchester Rural District.