Sierra Baja
Sierra Baja is a barrio in the municipality of Guayanilla, Puerto Rico. Its population in 2010 was 602.History
The United States took control of Puerto Rico from Spain in the aftermath of the Spanish-American War under the terms of the Treaty of Paris of 1898. In 1899, the United States conducted its first census of Puerto Rico finding that the population of Sierra Baja barrio was 787.
