- Rhymes: -ædəʊ
Caddo (plural Caddo or Caddos)
- A member of one of the Caddo tribes.
- A confederacy of several southeastern Native American tribes, who inhabited much of what is now East Texas, western Louisiana and portions of southern Arkansas and Oklahoma in the sixteenth century.
- A Caddoan language of the Southern Plains of the United States, spoken by the Caddo Nation of Oklahoma.
- A town in Oklahoma.