Ajo, Arizona

Ajo
Ajo plaza in 1990
Location in Pima County and the state of Arizona
Ajo
Location in the United States
Ajo
Location within Arizona
Coordinates: 32°22′53″N 112°52′10″W / 32.38139°N 112.86944°W / 32.38139; -112.86944
CountryUnited States
StateArizona
CountyPima
Area
  Total
33.33 sq mi (86.32 km2)
  Land33.33 sq mi (86.32 km2)
  Water0.00 sq mi (0.00 km2)
Elevation
1,759 ft (536 m)
Population
 (2020)
  Total
3,039
  Density91.19/sq mi (35.21/km2)
Time zoneUTC-7 (MST (no daylight saving time))
ZIP code
85321
Area code520
FIPS code04-00870
GNIS feature ID0000538

Ajo (/ˈɑːh/ AH-hoh) is an unincorporated community in Pima County, Arizona, United States. It is the closest community to Organ Pipe Cactus National Monument. The population was 3,039 at the 2020 census. Ajo is located on State Route 85 just 43 miles (69 km) from the Mexican border.