In 1899, the United States Department of War conducted a census of Puerto Rico finding that the population of Beatriz barrio was 868.

Botanist William Edwin Safford visited Beatriz in 1898 to document the local plant life.

[20] The 1899 San Ciriaco hurricane devastated Beatriz, and many farmers began working for the newly established military government of the United States of America building roads.

[21] At the time, a store owned by wealthy landowner Don Ramón Álvarez was the center of economic life in Beatriz.

[22] Beatriz barrio was hit by Hurricane Maria on 20 September 2017 and many residents still did not have electricity as of March 2018, six months later.