Anón River (Spanish: Río Anón) 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.

The river originates in the mountains of the Toro Negro State Forest, in barrio Anón in Ponce, and cuts through the center of Barrio Anón. It then feeds into Río Inabón just south of the intersection of PR-511 and Camino Jurutungo in central Barrio Anón. Río Anón has both its origin and its mouth in barrio Anón.

The following table summarizes the course of Rio Anón in terms of roads crossed. Roads are listed as the river flows from its origin in the mountains of Barrio Anón, north of the city of Ponce, to its feeding into Rio Inabón (N/A = Data not available):

Río Anón becomes Río Inabón at the point just south of the intersections of PR-511 and Camino Jurutungo. After this point, Río Inabón winds its way through the hills paralleling PR-511 through barrios Anón and Real. It follows by the eastern edge of barrio Coto Laurel, and then forms the border between barrios Vayas and Capitanejo before it empties into the Caribbean Sea as Río Inabón.

• List of rivers of Puerto Rico
• List of rivers of Ponce

• USGS Hydrologic Unit Map – Caribbean Region (1974)
• Rios de Puerto Rico