There are no rivers "in" the Gulf of Mexico. But the longest river that empties into the Gulf is the Mississippi River, whose delta forms the "boot" of southeastern Louisiana.
Some of them would include the Mississippi and Rio Grande rivers.
Mississippi river
The Mississippi River.
The Mississippi river.
I believe its Mississippi river.
It flows southward into the Gulf of Mexico.
The Mississippi River is one of the longest in the US, and flows from northern Minnesota south to the Gulf of Mexico.
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.)
Gulf of Mexico.
The Mississippi River flows into the gulf of Mexico (from the us)
The Mississippi river flows into the gulf of Mexico
The gulf of Mexico
This river flows into the Gulf of Mexico, AKA the Pacific Ocean
colarado river
Connecticut river
The Mississippi River flows from its starting point in Minnesota to the Gulf of Mexico, which means it flows south.
The Mississippi River ends (flows into the Gulf of Mexico) in the state of Louisiana.