Tohono Oʼodham Indian Reservation Information (Geography)
The Tohono Oʼodham Indian Reservation, is an Indian reservation of the Tohono Oʼodham Nation located in Arizona, United States.  The reservation had a total 2000 census population of 10,787. The reservation has a land area of 11,243.098 square kilometres (4,340.984 sq mi), 97.48 percent of the Tohono Oʼodham Nation total area. The reservation encompasses portions of central Pima, southwestern Pinal, and southeastern Maricopa Counties.
The land is also site of the Quinlan and Baboquivari Mountains, which include Kitt Peak, and the Kitt Peak National Observatory and telescopes, as well as Baboquivari Peak. These astronomical sites are under lease from the Tohono Oʼodham Nation. The lease was approved by the council in the 1950s, for a one-time payment of US$25,000 plus $10 per acre per year. 
The telephone area code for the Tohono Oʼodham Reservation is 520.
- "Home". Official Website of the Tohono Oʼodham Nation. 2014. Retrieved 2014-04-24.
- "Astronomy Development on Another Sacred Mountain: Kitt Peak". Mauna Kea – From Mountain to Sea. Na Maka o ka Aina. 2005. Archived from the original on 2008-08-20. Reprinting material from the Arizona Daily Star, 2005.