Buenos Aires, also known as Buena Ayres or Buenos Ayres, is a populated place situated in Pima County, Arizona.[2] It has an estimated elevation of 3,045 feet (928 m) above sea level.[1] Buenos Aires is located on the Tohono Oʼodham Indian Reservation. The settlement once had its own school district (School District No. 11, Pima County),[3] which has since become part of the Baboquivari Unified School District.

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