Residential delivery area · Arizona
ZIP Code 85321: Ajo, AZ
ZIP code 85321 uses the postal name Ajo, Arizona and lies mostly in Pima County (89% of its land) with the rest in Maricopa County (Census 2020 ZIP-county file). About 3,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $53,180 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Ajo (2%), Why (under 1%), Charco (under 1%), Ventana (under 1%) and Kaka (0%); 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Ajo · its only residential ZIP
- County
- Pima County (89%); Maricopa County (11%)
- Census places
- Ajo (2%) census-designated place; Why (under 1%) census-designated place; Charco (under 1%) census-designated place; Ventana (under 1%) census-designated place
- Metro area
- Tucson, AZ
- House district
- AZ-7 119th Congress
- State
- Arizona
- Time zone
- Mountain (no daylight saving)
- Land area
- 1,343.8 sq mi · 3 people per sq mi
Where is ZIP code 85321?
85321 centers on 32.362°, -112.585° and covers 1,343.8 square miles of land plus 0.1 of water. It borders 2 ZIP codes: 85341, 85634.
The map draws ZIP code areas only. For the streets inside 85321, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 85321 compare with the rest of Pima County?
| Measure | 85321 | In Pima County | In AZ |
|---|---|---|---|
| People (ACS 2020-2024) | 3,555 | 41st of 56 | 255th of 417 |
| Median household income | $53k | 31st of 39 | 229th of 264 |
| Median home value | $119k | 40th of 40 | 264th of 282 |
Its median household income is higher than in 19% of U.S. residential ZIP codes, and it is denser than 7% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 85321?
The 2020 Census counted 3,663 people in 85321; the ACS, which samples households over 2020-2024, estimates 3,555. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 3,555±528 (90% margin)
- 2020 Census count
- 3,663
- Households
- 1,656
- Median age
- 58.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 85321?
Of the 3,555 people the ACS estimates in 85321, 12.0% are under 18 and 39.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (53.1%), then Hispanic or Latino (26.9%).
- Under 1812.0%
- 18 to 6448.7%
- 65 and older39.4%
- White, not Hispanic53.1%
- Hispanic or Latino26.9%
- Other or two or more19.4%
- Asian, not Hispanic0.6%
- Black, not Hispanic0.1%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 85321 earn?
Median household income is $53,180 (ACS 2020-2024), the 31st highest of the 39 ranked ZIP codes in Pima County.
- Median household income
- $53,180±$7,044
- Income per person
- $29,536
- Below the poverty line
- 17.2%
- Unemployed (of the labor force)
- 8.4%
- Adults 25+ with a bachelor's degree
- 25.4%
- Adjusted gross income per tax return, 2022
- $45,9741,390 returns; wages 70% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 85321?
FHFA's house price index for 85321, built from repeat sales and appraisals of the same homes, rose 66% from 2015 to 2025 and rose 56% from 2020 to 2025.
- Median home value (owners' estimate)
- $119,000
- Median gross rent
- $875
- Homes owned by their occupants
- 71.1%
- Housing units
- 2,291
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 85321?
52 business establishments had a location in this ZIP code in 2023, 5 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade13
- Accommodation and food services9
- Other services (except public administration)7
- Health care and social assistance6
- Information3
- Finance and insurance3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 85321?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 85341 | Lukeville | 37 | – | 28.0 mi |
| 85634 | Sells | 5,038 | $36k | 40.9 mi |
| 85139 | Maricopa | 20,784 | $87k | 44.6 mi (near) |
| 85337 | Gila Bend | 2,041 | $55k | 45.4 mi (near) |
| 85172 | Stanfield | 1,688 | $72k | 52.4 mi (near) |
| 85193 | Casa Grande | 4,118 | $58k | 53.4 mi (near) |
| 85138 | Maricopa | 55,260 | $96k | 56.9 mi (near) |
| 85322 | Arlington | 476 | $75k | 57.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.