Bishop's Waltham is a medieval market town situated at the source of the River Hamble in Hampshire, England. It has a foot in the South Downs National Park and is located at the midpoint of a long-established route between Winchester and Portsmouth. It is home to the ruins of Bishop's Waltham Palace, a Scheduled Ancient Monument under English Heritage management, and a well-preserved high street with many listed buildings which now house independent shops.

The River Hamble in south Hampshire, England, rises near Bishop's Waltham and flows for 10.1 km (6.3 mi) through Botley, Bursledon, and Lower Swanwick before entering Southampton Water between Hamble Common and Warsash.