PlainZIP

Ajo, AZ · standard

ZIP Code 85321

Pima County, Arizona — Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

4,435
1/sq mi
$53,180
Median income
$119,000
Median home value
25.4%
Bachelor's or higher

The verdict

Ajo pairs one of the lowest household incomes in the country with among the most affordable home values nationally, in a rural, homeowner-dominated area.

19th pct
household income, US ZIPs
16th pct
home value, US ZIPs
1
people per sq mi
71%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 85321 against every reporting US ZIP.

ZIP code 85321 is classified by USPS as a standard delivery area and covers roughly 4031.8 square miles in Ajo, Pima County, Arizona. The area is home to 4,435 residents, producing a population density of 1 people per square mile, and falls within the Phoenix time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 85321 against Arizona and the nation.

On the economic side, the median household income for ZIP 85321 sits at $53,180 (27% below the Arizona average), while per-capita income is $29,536. The poverty rate stands at 17.2% and the unemployment rate at 8.4%. On housing, the median home value is $119,000 (65% below the state average) with median rent at $875 per month, and 71.1% of occupied units are owner-occupied, a direct signal of whether 85321 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 25.4% of adults hold a bachelor's degree or higher, the median age is 58.9, and the average commute is —. Use the benchmarks above to see where 85321 sits relative to Arizona and the national baseline rather than viewing the numbers in isolation. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →

Top industries in ZIP 85321

Top 5 sectors by establishment count

Which industries have the most business establishments in ZIP 85321.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 85321, Ajo, AZ · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.

Quick Facts

4,435

Population

4031.8

Area (sq mi)

1

People / sq mi

Phoenix

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 85321?

58.9

Median Age

49.3%

Male

50.7%

Female

4.5%

Foreign-Born

White 58.1%
African American 0.1%
Asian 0.6%
American Indian or Alaska Native 15.6%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 21.5%
Hispanic or Latino 26.9%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$53,180

Median Household Income

-27% vs state

$29,536

Per Capita Income

17.2%

Poverty Rate

8.4%

Unemployment Rate

How ZIP 85321 ranks nationally

Household income vs. every US ZIP code

Median household income — the full national distribution, with this ZIP marked

$53,180 19th percentile higher than 19% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). This entry sits in this band. $60,000–$80,000: 9,980 US ZIPs (33%). Above this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau — ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 48.8%
Bachelor's Degree or Higher 25.4%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

2,291

Total Housing Units

1,656

Occupied Units

635

Vacant Units

2.14

Avg Household Size

Occupancy Type

Owner 71.1%
Renter 28.9%

$119,000

Median Home Value

-65% vs state

$875

Median Rent

1961

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+19.6%

YoY Change (2023)

179

HPI Index (2000 = 100)

+79%

Total Change Since 2000

Home values in ZIP 85321 have increased 19.6% over the past year (2023). Since 2000, this ZIP has seen +79% cumulative appreciation.

Year Annual Change HPI Index
2019 +21.8% 127
2020 -3.1% 123
2021 +19.7% 148
2022 +1.6% 150
2023 +19.6% 179

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2023. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 52 business establishments in ZIP 85321, employing approximately 406 people with a combined annual payroll of $17,904,000.

52

Businesses

406

Employees

$17.9M

Annual Payroll

7

Industry Sectors

Industry Establishments % of Total
Retail trade 13 25.0%
Accommodation and food services 9 17.3%
Other services (except public administration) 7 13.5%
Health care and social assistance 6 11.5%
Information 3 5.8%
Finance and insurance 3 5.8%
Arts, entertainment, and recreation 3 5.8%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

More ZIP Codes in Pima County

85705 standard
Tucson, AZ
Pop: 57,521
85706 standard
Tucson, AZ
Pop: 55,209
85710 standard
Tucson, AZ
Pop: 54,439
85713 standard
Tucson, AZ
Pop: 50,151
85719 standard
Tucson, AZ
Pop: 43,989
85746 standard
Tucson, AZ
Pop: 43,057

Related Areas

Pima County Ajo, AZ Arizona

Frequently Asked Questions

What county is ZIP code 85321 in? ▼
ZIP code 85321 (Ajo) is located in Pima County, Arizona. Pima County contains multiple ZIP codes, see the full list at /counties/pima-az.
What is the population of ZIP code 85321? ▼
ZIP code 85321 in Ajo, AZ has a population of 4,435 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 85321? ▼
The median household income in ZIP 85321 is $53,180, which is 30% below the national average of $76,288.
What is the average home value in ZIP 85321? ▼
The median home value in ZIP 85321 is $119,000, which is 57% below the national average of $278,155.
What is the demographic makeup of ZIP 85321? ▼
The largest racial group in ZIP 85321 is White at 58.1%. Hispanic or Latino residents make up 26.9% of the population.
How many businesses are in ZIP code 85321? ▼
ZIP code 85321 has 52 business establishments employing approximately 406 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 85321? ▼
The top industries by establishment count in ZIP 85321 are: Retail trade (13), Accommodation and food services (9), Other services (except public administration) (7). There are 7 industry sectors represented in total.
How have home values changed in ZIP code 85321? ▼
According to the FHFA House Price Index, home values in ZIP 85321 increased by 19.6% in 2023. Since 2000, home values in this ZIP have appreciated by approximately 79%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 85321? ▼
In ZIP code 85321, 48.8% of residents aged 25+ have a high school diploma or higher, and 25.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 85321? ▼
In ZIP code 85321, approximately 71.1% of occupied housing units are owner-occupied and 28.9% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 85321? ▼
The poverty rate in ZIP code 85321 is 17.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

ZIP Code Research Guides

Reading Census Demographics
How to interpret population, income, and education data from the Census Bureau.
Understanding ZIP Code Data
What ZIP codes are, how ZCTAs differ, and what the data reveals.
Best ZIP Codes for Families
Key factors to evaluate when choosing a family-friendly neighborhood.
ZIP Codes for Relocation
Data-driven tips for evaluating ZIP codes before a move.

Official Data Resources for Ajo, AZ

Verify and explore additional data for this area using these official government sources.

U.S. Census Bureau
Official demographic, economic, and housing data from the American Community Survey.
HUD Fair Market Rents
Department of Housing and Urban Development rental cost estimates by metropolitan area.
FBI Uniform Crime Reports
Official crime statistics compiled from law enforcement agencies nationwide.
FHFA House Price Index
Federal Housing Finance Agency home value trends based on repeat sales and appraisals.

Read our methodology to see how this data is sourced, computed, and verified.