Four Directions Institute: Tonkawan Tribes
- Tribal profile, timeline, and links.
- http://www.fourdir.com/tonkawan_tribes.htm

Plains and Plateau Tribes: Tonkawa
- Basic information about the tribe's traditional gender, sex, and societal roles.
- http://www.bigeye.com/sexeducation/tonkawa.html

Texas Indians: Tonkawa
- Brief overview of the Tonkawa, their culture and history, with a link to a book on the Tonkawa for sale. From the Texas Indians series.
- http://www.texasindians.com/tonk.htm