The Alabama–Coushatta Tribe of Texas is a federally recognized tribe of Alabama and Koasati in Polk County, Texas, United States. These peoples are descended from members of the historic Muscogee or Creek Confederacy of numerous tribes in the Southeastern U.S., particularly Georgia and Alabama.

Alabama, also known as Alibamu, is a Native American language, spoken by the Alabama-Coushatta tribe of Texas. It was once spoken by the Alabama-Quassarte Tribal Town of Oklahoma, but there are no more Alabama speakers in Oklahoma. It is a Muskogean language, and is believed to have been related to the Muklasa and Tuskegee languages, which are no longer extant. Alabama is closely related to Koasati and Apalachee, and more distantly to other Muskogean languages like Hitchiti, Chickasaw and Choctaw.