The River Hamble is a river in Hampshire, England. It rises near Bishop's Waltham and flows for some 7.5 miles (12 km) through Botley, Bursledon and Swanwick before entering Southampton Water near Hamble-le-Rice and Warsash.

The Hamble is tidal for approximately half its length and is navigable in its lower reaches, which have facilitated shipbuilding activities since medieval times. Leisure craft are still built there today.
One of these builders was Luke & co, later Luke Bros, a reputed yard at Hamble from around 1890 to 1945.

The river, and its shipbuilding yards, have also been used for military purposes, particularly during World War II.

Its lower reaches are now very popular for boating, being known throughout the sailing world as The Heart of British Yachting

Bishops Waltham to Botley (non-tidal)

From its source near Bishop's Waltham, the river flows in a generally southerly direction picking up several small tributary streams before reaching Botley, the site of an ancient watermill.