Río San Juan (Spanish for St. John's River) may refer to:
Rivers San Juan River (Argentina) Río Grande de San Juan, Argentina San Juan River (Vancouver Island), Canada San Juan River (Colombia) San Juan River (Guatemala) , Mexico, affected by the 2021 Tula River floods San Juan River (Tamaulipas), Mexico San Juan River (Veracruz), Mexico San Juan River (Nicaragua) San Juan River (Calamba), Philippines San Juan River (Metro Manila), Philippines St. Johns River, Florida, U.S. San Juan River (Colorado River tributary) Utah, U.S. San Juan River (Uruguay) San Juan River (Venezuela)
Other Río San Juan, Dominican Republic, a municipality Río San Juan Department, Nicaragua Río San Juan Wildlife Refuge, Nicaragua
See also San Juan River (disambiguation)