In 1998, Matayaya became a municipal district; Pedro Corto in 2000; Sabaneta, Arroyo Cano and Yaque in 2004; Carrera de Yeguas, Sabana Alta, El Rosario, Hato del Padre, Guanito, La Jagua, Derrumbadero and Batista in 2005; Las Maguanas-Hato Nuevo, Las Charcas de María Nova, Jinova and Jorjillo in 2006; and Las Zanjas in 2007.