巴塞圣苏是西非国家冈比亚的城镇，也是上河区的首府，位于冈比亚河南岸，距离首都班珠尔396公里，是重要的市集，2009年人口估计约18,414。

Basse Santa Su, usually known as Basse, is a town in the Gambia, lying on the south bank of the River Gambia. The easternmost town in the nation, it is known for its important market. As of 2009 it has an estimated population of 18 414.