Río Abajo, Vega Baja, Puerto Rico

Río Abajo is a barrio in the municipality of Vega Baja, Puerto Rico. Its population in 2010 was 4,795.

History
Río Abajo was in Spain's gazetteers until Puerto Rico was ceded by Spain in the aftermath of the Spanish–American War under the terms of the Treaty of Paris of 1898 and became an unincorporated territory of the United States. In 1899, the United States Department of War conducted a census of Puerto Rico finding that the combined population of Río Abajo and Río Arriba barrios was 1,092.