Río San Juan Department
Río San Juan () is a department in Nicaragua. It was formed in 1957 from parts of Chontales and Zelaya departments. It covers an area of 7,543 km and has a population of 135,446 (2020 estimate). The capital is San Carlos. The Department also includes the Solentiname Islands archipelago and the San Juan River, after which it is named. Trinidad, in Río San Juan, is the most southerly point in Nicaragua.