南圣胡安是尼加拉瓜的城镇，位于该国西南部，由里瓦斯省负责管辖，始建于1851年，面积411平方公里，海拔高度92米，2005年人口14,741，人口密度每平方公里35.87人。

San Juan del Sur is a municipality and coastal town on the Pacific Ocean, in the Rivas department in southwest Nicaragua. It is located 140 kilometres (87 mi) south of Managua. San Juan del Sur is popular among surfers and is a vacation spot for many Nicaraguan families and foreign tourists.