L1 users: 600 (Golla 2007), decreasing. Ethnic population: 35,000 (1999 Chickasaw Nation).
Oklahoma: Byng and Happyland (near Ada) north, Davis and Ardmore west, to Fillmore and Wapanucka east. California: Los Angeles.
None known. Choctaw [cho] find Chickasaw unintelligible.
Shifting to English [eng]. Not learned by children. Speakers 50 years and older.