The Yuna River is the second longest river in the Dominican Republic, stretching for a length of 185.17 km. It forms within the Cordillera Central mountain range southwest of the city of Bonao in Monseñor Nouel Province, and passes through the fertile Cibao Valley. As the river courses north-northeast, it passes through the city of Bonao. Southwest of Cotuí, the river reaches Hatillo Dam before turning northeast then east as it reaches its mouth at the Samaná Bay in the northeast part of the Dominican Republic. Like many rivers in the Dominican Republic, the name is derived from the Taíno language.

The Cibao, usually referred as "El Cibao", is a region of the Dominican Republic located at the northern part of the country. As of 2009 the Cibao has a population of 5,622,378 making it the most populous region in the country.