It drains into the river delta which enters the Gulf of Mexico in the south part of Louisiana. Basically all of the central US between the Appalachian mountains in the East & the Rockies in the west.
The basin covers more than 1,245,000 square miles, including all or parts of 31 U.S. states and two Canadian provinces.
the mississippi drainage basin is located between the Appalachian Mountains and the Rocky Mountains
The largest known river basin in the United States is the Mississippi
the Mississippi river drainage basin, Colorado river drainage basin, and the Columbia river drainage basin
Drained
A drainage basin is simply an area between two ridges from which water drains as a stream or river. A small creek has its own drainage basin. The drainage basin of the Mississippi River includes everything between the Rocky Mountains and the Adirondacks.
I checked the web for this next answer, and it says the Amazon River is the longest river/drainage basin in the world. I hope that helped! :)
Mississippi
east
West of the river
See Maps at web page below
West of the river
West of the river