Ajo, Arizona

Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.

On the National Register 6 records

• Ajo Townsite Historic Districtlisted 2001
• Bates Well Ranchlisted 1994
• Curley Schoollisted 2008
• Dos Lomitas Ranchlisted 1994
• John and Isabella Greenway Houselisted 1998
• I'itoi Mo'o-Montezuma's Head and 'Oks Daha-Old Woman Sittinglisted 1994

Surveyed buildings and structures 4 records

• Bates Well, Corral, Growler Wash, Ajofederal building survey, 1 photograph
• Bates Well, Cowhand House, Growler Wash, Ajofederal building survey, 2 photographs
• Bates Well, Jacal, Growler Wash, Ajofederal building survey, 1 photograph
• Hocker Well, Jacal, Ajofederal building survey, 2 photographs

Ajo fell from 3,705 to 3,039 between 2000 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1932 USGS Ajo quadrangle1:62500
• 1934 USGS Ajo quadrangle1:62500, 2 printings
• 1953 USGS Ajo quadrangle1:250000, 2 printings
• 1957 USGS Ajo quadrangle1:250000
• 1958 USGS Ajo quadrangle1:250000, 2 printings
• 1962 USGS Ajo quadrangle1:250000
• 1963 USGS Ajo quadrangle1:250000
• 1963 USGS Ajo quadrangle1:62500, 2 printings
• 1967 USGS Ajo quadrangle1:250000
• 1980 USGS Ajo quadrangle1:100000
• 1982 USGS Ajo quadrangle1:250000
• 1990 USGS Ajo South quadrangle1:24000
• 1996 USGS Ajo South quadrangle1:24000

Taken for the Office of War Information and the Farm Security Administration, who photographed the country between 1935 and 1944. Works of United States government photographers, with no known restriction on use. Each opens its catalogue record.

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 5 fires within 5 miles of Ajo between 1995 and 2017, burning about 41 acres in total. 2 started naturally. None was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Mexican Town
• Gibson
• Rowood
• Chico Shunie
• Black Mountain Estates
• Drexel Heights

Every fire recorded in Pima County

Regional context, not property-specific evidence. The federal mineral resources record lists 25 workings within 5 miles of Ajo: 9 occurrences, 7 producers, 4 past producers, 3 unknowns. 8 still produce. What was taken out: Copper, Copper, Gold, Silver, Gold, Silica. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Pima County

Regional context, not property-specific evidence. The National Weather Service names Ajo in 23 storm reports between 1993 and 2023: 13 thunderstorm wind, 8 flash flood, 2 heavy rain. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

Every storm recorded in Pima County

1 paper published in this town, digitised by the Library of Congress and free to read: 524 issues, 3,531 pages. Every page is searchable, so a name or a street can be looked for directly in what the town printed about itself at the time.

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

This settlement is recorded in the Geographic Names Information System as feature 538. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.