None. The Gulf of Mexico is part of the greater Atlantic Ocean; as such, it is not fed by any river -- unlike landlocked seas, such as the Aral or Dead Sea.
There are several rivers however, that flow into the gulf, including the Mississippi, Rio Grande, Grijalva and Usumacinta rivers.
The Mississippi empties into the Gulf of Mexico.
The largest river that empties into the Gulf of Mexico is the Mississippi River.
Niger river
The mouth of the Mississippi is the Gulf of Mexico.
* Gulf of Mexico * Rio Grande * Sabine River * Red River
The Mississippi river starts in northern Minnesota, at lake Itasca. Then it flows south and empties into the Gulf of Mexico. (It is debated if the Mississippi runs into the Missouri river or if the Missouri runs into the Mississippi river.)
The Gulf of Mexico. The Gulf of Mexico. The Gulf of Mexico.
The Gulf of Mexico. The Gulf of Mexico. The Gulf of Mexico.
The Mississippi River empties into the Gulf of Mexico in Louisiana.
the river that mexicans better not swim across illegally...
the Mississippi river does, and a bazillion others.
Gulf of Mexico