The Coosa River begins in Rome, Georgia, where the Etowah and Oostanaula Rivers meet, and flows southwest through northeastern Alabama to Montgomery, where it meets with the Tallapoosa River to form the Alabama River.

The Coosa River begins in Rome, Georgia, where the Etowah and Oostanaula Rivers meet, and flows southwest through northeastern Alabama to Montgomery, where it meets with the Tallapoosa River to form the Alabama River.