32°09′01″N 112°02′41″W / 32.15028°N 112.04472°W / 32.15028; -112.04472

The Tohono Oʼodham Indian Reservation, is an Indian reservation of the Tohono Oʼodham Nation in Arizona, United States. The reservation had a 2020 census population of 9,561. It has an area of 4,340.984 square miles (11,243.098 km), 97.48 percent of the Tohono Oʼodham Nation's total area. The reservation encompasses parts of central Pima, southwestern Pinal, and southeastern Maricopa Counties.

The land is also the 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.

When Spaniards first encountered the tribe in 1694, they made note of one of the tribe's inhabited villages called Batki, a site that was abandoned around 1850. Batki was in what is now the Sells District of the Tohono O'odham Nation.

You can help expand this section with text translated from the corresponding article in German. (September 2024) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:Tohono O’odham Nation Reservation]]; see its history for attribution. You may also add the template {{Translated|de|Tohono O’odham Nation Reservation}} to the talk page. For more guidance, see Wikipedia:Translation.

The telephone area code for the Tohono Oʼodham Reservation is 520.