Las Marías (Spanish pronunciation: [las maˈrias], locally [ˌlaʔ maˈɾiaʔ]) is a town and municipality of Puerto Rico located north of Maricao; southeast of Añasco; south of San Sebastián; east of Mayagüez; and west of Lares.

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 a territory of the United States.

In 1899, the United States Department of War conducted a census of Puerto Rico finding that the population of Las Marías was 11,279.

In Las Marías, multiple landslides left highways covered in mud, trees and debris.

[3] In some areas of Las Marías there were more than 25 landslides per square mile due to the significant amount of rainfall and wind.

The Fiestas Patronales Inmaculada Concepción de María is a religious and cultural celebration that generally features parades, games, artisans, amusement rides, regional food, and live entertainment.

The monogram and crown of Nuestra Señora la Santísima Virgen de Plata is placed in the top center portion of the shield.