Ajo, Ajó, or AJO may refer to:
Places Ajo, Arizona, a census-designated place in Pima County, Arizona, US Ajo Peak, a mountain peak in southern Arizona Little Ajo Mountains, a mountain range in southern Arizona Ajo Unified School District Ajo High School Ajo Air Force Station, a closed US Air Force General Surveillance Radar station in southern Arizona Ajo Copper News, a weekly community newspaper serving western Pima County, Arizona Ajo, Cantabria, the capital of Bareyo municipality in Cantabria, Spain Mar de Ajó, a coastal city in Buenos Aires Province, Argentina Ajó, an alternate name for General Lavalle, a town in Buenos Aires Province, Argentina
People Aki Ajo (born 1968), Finnish motorcycle racer Ajo Motorsport, a motorcycle racing team named after Aki Ajo Niklas Ajo (born 1994), Finnish motorcycle racer, eldest son of Aki Ajo
Other uses Finlandia-Ajo, an annual Group One harness event Corona Municipal Airport, which has the location identifier AJO AcademicJobsOnline.org, a recruitment service for higher education, founded by the mathematics department at Duke University