The Guayanilla River (Spanish: Río Guayanilla) is a river of Guayanilla, Puerto Rico.

USACE project

In mid 2018, the United States Army Corps of Engineers announced it had earmarked $3 million to study and research the river.

See also

• List of rivers of Puerto Rico
• Monte Guilarte

18°00′07″N 66°46′29″W / 18.0019101°N 66.7746195°W / 18.0019101; -66.7746195