Guaynabo River
Guaynabo River between Río and Mamey barrios
Native name	Río Guaynabo (Spanish)
Location
Commonwealth	Puerto Rico
Municipality	Guaynabo
Physical characteristics
Source
• coordinates	18°22′28″N 66°08′05″W / 18.3743940°N 66.1346111°W / 18.3743940; -66.1346111[1]
• elevation	46 ft

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

• General Norzagaray Bridge: crosses the Frailes Creek tributary
• List of rivers of Puerto Rico

• USGS Hydrologic Unit Map – Caribbean Region (1974)
• Ríos de Puerto Rico (in Spanish)