[3] The river then continues to the southwest, and after approximately 30 miles (48 km) it enters Grand Bassa County.

[3] Here it receives the Mechlin and Benson rivers as it empties into the Atlantic Ocean near Edina and Buchanan.

[2] The river's drainage basin covers 14,762 square kilometres (5,700 sq mi) over both Liberia and Guinea.

[5] The average annual discharge of the St. John is 136.06 m3/s (4,805 cu ft/s) as measured at the inland station of Baila.

[7] The river received its name from Portuguese explorers in the 15th Century who spotted the mouth on St. John's feast day.

[9] Birds also use the riverbanks and islands as nesting grounds, including the Three-cusped Pangolin, Palaearctic, Sandpipers, Greenshanks, Little Ringed Plover, and Water Chevrotain in the Kpatawee Wetlands area in Bong County.