Monacillo Urbano is one of 18 barrios in the municipality of San Juan, Puerto Rico. The barrio was originally part of Monacillo. In 2010, it had a population of 22,342 living in a land area of 3.23 square miles (8.68 km<sup>2</sup>). Monacillo Urbano is surrounded by Gobernador Piñero barrio to the north, El Cinco barrio to the east, Monacillo barrio to the south, and the municipality of Guaynabo to the west.