Anón River is a river in the municipality of Ponce, Puerto Rico. It is located in the northeastern area of the municipality. Río Anón is one of the 14 rivers in the municipality and, at 1,060 feet (320 m), it is also the third with the highest river mouth location, after Río Prieto and Río Blanco, both of which have their mouths at 1,381 feet (421 m). Río Anón is a tributary of Río Inabón. It has a length of approximately 4 kilometers (2.5 mi) and generally runs south. It has both its origin and its mouth in Barrio Anón.