Río San Juan is a department

Departments of Nicaragua

Nicaragua is a unitary republic, and for administrative purposes, it is divided into 15 departments and two self-governing regions based on the Spanish model:-Zelaya Department:...

 in Nicaragua

Nicaragua

Nicaragua is the largest country in the Central American American isthmus, bordered by Honduras to the north and Costa Rica to the south. The country is situated between 11 and 14 degrees north of the Equator in the Northern Hemisphere, which places it entirely within the tropics. The Pacific Ocean...

. It was formed in 1957 from parts of Chontales and Zelaya departments. It covers an area of 7,473 km² and has a population of 95,500 (2005 census). The capital is San Carlos

San Carlos, Río San Juan

San Carlos is the capital city of the municipality of San Carlos and of the Río San Juan Department of Nicaragua. The city proper has a population of roughly 12,174, while the city and surrounding communities contain 37,461 as of 2005. San Carlos is positioned on the confluence of Lake Nicaragua...

. The Department also includes the Solentiname Islands

Solentiname Islands

The Solentiname Islands are an archipelago towards the southern end of Lake Nicaragua in the Nicaraguan department of Río San Juan...

 archipelago

Archipelago

An archipelago , sometimes called an island group, is a chain or cluster of islands. The word archipelago is derived from the Greek ἄρχι- – arkhi- and πέλαγος – pélagos through the Italian arcipelago...

 and the San Juan River

San Juan River (Nicaragua)

The San Juan River , also known as El Desaguadero , is a 192.06 km river that flows east out of Lake Nicaragua into the Caribbean Sea. A large section of the border between Nicaragua and Costa Rica runs on the right bank of the river...

, after which it is named. Trinidad, in Rio San Juan, is the most southerly point in Nicaragua.

Municipalities

1. El Almendro
   El Almendro
   El Almendro is a rural municipality in the Río San Juan department of Nicaragua.Tradition states that El Almendro was founded in 1892, when Nery López, Perfecto Romero Acosta, Francisco González, and others, searchers of rubber trees and growers of Ipecacuanha arrived looking for rubber and...
   
   
2. El Castillo
3. Morrito
   Morrito
   Morrito is a municipality in the Río San Juan department of Nicaragua. the current mayor is Eda Medina.The total population of the municipality is approximately 1,700 “town” residents and 5,000 rural inhabitants, with includes a total of about 3,000 people under the age of 16 years old .The main...
   
   
4. San Carlos
   San Carlos, Río San Juan
   San Carlos is the capital city of the municipality of San Carlos and of the Río San Juan Department of Nicaragua. The city proper has a population of roughly 12,174, while the city and surrounding communities contain 37,461 as of 2005. San Carlos is positioned on the confluence of Lake Nicaragua...
   
   
5. San Juan de Nicaragua
6. San Miguelito
   San Miguelito, Río San Juan
   San Miguelito is a municipality in the Río San Juan department of Nicaragua.San Miguelito is twinned with the town of Waltrop, Germany...