The Rio Grand.
The Mississippi River borders Illinois on the west.
The major river that borders this area on the west is the Mississippi River.
The Ohio River
Texas borders Louisiana on the west.
The Mississippi River.
The boundary rivers of Texas are the Red River to the north, the Sabine River to the east, the Rio Grande to the south, and the Pease River to the west. These rivers help define the borders of the state with its neighboring states and Mexico.
The Mississippi River
the Potomac River
The state next to Louisiana (LA) is Texas. Texas borders Louisiana to the west, and the two states share a long boundary along the Sabine River and other areas. In addition to Texas, Louisiana also borders Arkansas to the north and Mississippi to the east.
New Mexico
Mississippi
Louisiana is bordered by Texas to the west. Austin is the capital city in Texas.