Santiago River
Santiago River near Bridge No. 122
Native name	Río Santiago (Spanish)
Location
Commonwealth	Puerto Rico
Municipality	Naguabo
Physical characteristics
Source
• coordinates	18°11′17″N 65°43′31″W / 18.1880148°N 65.7251616°W / 18.1880148; -65.7251616[1]
Length	5.95 miles
Basin size	6.84 sq miles

Río Santiago is a short river of Puerto Rico. About 5.95 miles (9.58 km) long, it is spanned by historic Bridge No. 122 on the coastal road near barrio Duque in Naguabo, Puerto Rico. It discharges into the Caribbean Sea from Naguabo.^[2]

• 
  Santiago River in 1915

• List of rivers of Puerto Rico

• USGS Hydrologic Unit Map – Caribbean Region (1974)