Bridgewater On Loddon is a town in north central Victoria, Australia. The town is located on the Calder Highway, north-west of Bendigo, astride the Loddon River. At the 2021 census, Bridgewater On Loddon had a population of 341. The rural area which surrounds Bridgewater on Loddon is named simply "Bridgewater".

The Shire of Loddon is a local government area in Victoria, Australia, located in the northern part of the state. It covers an area of 6,696 square kilometres (2,585 sq mi) and in 2021 had a population of 7,759.