85321 ZIP Code — Ajo, AZ

Pima County, Arizona

ZIP code 85321 is located in Ajo, Arizona, within Pima County. It covers approximately 1,343.78 square miles and serves a population of 3,621 residents. This is a standard ZIP code in the Mountain (MT) — no DST timezone, served by area code 520.

About ZIP code 85321

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $108,100. Owner-occupancy sits near the national average at 71%.

Median household income is $43,309. Poverty affects 20% of residents, above the national average. SNAP benefit usage at 19% of households reflects economic stress in the area. 53% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 19 minutes is near the national average.

Educational attainment is near the national average, with 29% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of diabetes (16%), smoking (23%) compared to national benchmarks.

Notable community characteristics include a notable veteran presence at 17% of civilians, above the national average of 7%; and disability rates above the national average at 29%.

Overall, ZIP code 85321 reflects a community defined by economic challenges above the national average, a strong veteran community, a significant Social Security-dependent population, and elevated reliance on food assistance.

3,621

population

1,343.78

sq mi land

Standard

ZIP type

Mountain (MT) — no DST

timezone

85321 ZIP code map

Cities in ZIP code 85321

Below are the cities the US Postal Service accepts for ZIP code 85321. Using any city not on this list may result in mail delivery delays.

City	Status
Ajo	Preferred

Demographics updated 06/2026

Population
Total population	3,621
Population density	3,621 / sq mi
State FIPS	04
County FIPS	019

Geography
Land area	1,343.78 sq mi
Water area	0.06 sq mi
Latitude	32.3422
Longitude	-112.7541
Timezone	Mountain (MT) — no DST
Area code	520

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	65.0%	45.3%	40.6%
$50k – $100k	26.2%	30.8%	31.9%
$100k – $200k	6.9%	18.8%	21.1%
Over $200k	2.0%	5.1%	6.4%

Demographics & statistics

3,621

Population

3,621

People per sq mi

56.7

Median age

$43,309

Median household income

$27,997

Per capita income

$108,100

Median home value

$742

Median monthly rent

71.4%

Home ownership

20.3%

Poverty rate

12.8%

Unemployment

1,930

Housing units

29.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

147

20–24

177

218

25–34

263

163

35–44

196

45–54

55–59

113

167

60–64

201

277

65–74

334

222

75–84

268

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	426	11.8%
18 and over	3,195	88.2%
65 and over	1,270	35.1%
Median age	56.7 years

Race & ethnicity

White 53.4%

American Indian / Alaska Native 19.3%

Two or more races 13%

Hispanic or Latino 11.7%

Other race 2%

Asian 0.5%

Black or African American 0.1%

Group	Count	%
White	2,191	53.4%
American Indian / Alaska Native	793	19.3%
Two or more races	533	13%
Hispanic or Latino	482	11.7%
Other race	81	2%
Asian	20	0.5%
Black or African American	3	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	65.0%	45.3%	40.6%
$50k – $100k	26.2%	30.8%	31.9%
$100k – $200k	6.9%	18.8%	21.1%
Over $200k	2.0%	5.1%	6.4%

Under $10k 4.1%

$10k–$15k 11.8%

$15k–$25k 13.4%

$25k–$35k 10.2%

$35k–$50k 20.1%

$50k–$75k 14.5%

$75k–$100k 7.4%

$100k–$150k 15.5%

$150k–$200k 0.7%

$200k+ 2.4%

Range	% of households
Under $10k	4.1%
$10k–$15k	11.8%
$15k–$25k	13.4%
$25k–$35k	10.2%
$35k–$50k	20.1%
$50k–$75k	14.5%
$75k–$100k	7.4%
$100k–$150k	15.5%
$150k–$200k	0.7%
$200k+	2.4%
Median income	$43,309

Housing

Home values

Under $50k 12.6%

$50k–$100k 30.5%

$100k–$150k 27.9%

$150k–$200k 13.9%

$200k–$300k 11.6%

$300k–$500k 1.0%

$1M+ 2.6%

Housing overview

Metric	Value
Median home value	$108,100
Median rent / month	$742
Owner occupied	71.4%
Renter occupied	28.6%
Vacant	28.4%
Single-family detached	81.5%
Large apartment buildings	3.8%
Mobile homes	11.7%
Median rooms	4.7
Avg household size (owned)	2.16

Year built

Era	%
2020 or later	0.0%
2010–2019	2.7%
2000–2009	3.6%
1990–1999	9.1%
1980–1989	8.0%
1970–1979	15.5%
1960–1969	14.7%
1950–1959	14.8%
1940–1949	16.9%
1939 or earlier	14.7%

Bedrooms

Size	% of units
No bedroom (studio)	4.6%
1 bedroom	13.2%
2 bedrooms	37.6%
3 bedrooms	41.0%
4 bedrooms	2.8%
5+ bedrooms	0.8%

Vehicles per household

Vehicles	% of households
No vehicle	16.1%
1 vehicle	36.2%
2 vehicles	30.3%
3 or more	17.4%

Heating fuel

Fuel type	%
Utility gas	39.1%
Electricity	53.5%
Propane / LP gas	4.4%
Wood	2.1%
Solar	0.2%
No fuel used	0.7%

Households & families

Household type	Count	%
Married-couple family	587	33.8%
Cohabiting couple	194	11.2%
Male householder, no spouse	264	15.2%
Female householder, no spouse	692	39.8%
Households with children under 18	265	15.3%
Households with seniors (65+)	951	54.7%
Average household size	2.07

Marital status

Status	Male	Female
Never married	41.2%	38.8%
Married	42.3%	33.4%
Separated	0.0%	1.9%
Widowed	5.6%	13.6%
Divorced	10.9%	12.2%

Education

Less than 9th grade 3.5%

Some HS, no diploma 6.5%

HS graduate 27.7%

Some college, no degree 26.8%

Associate's degree 6.2%

Bachelor's degree 20.8%

Graduate / professional 8.5%

Metric	%
HS diploma or higher	90.0%
Bachelor's or higher	29.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	38	6.0%
Kindergarten	14	2.2%
Elementary school	228	36.2%
High school	133	21.1%
College / grad school	216	34.3%

Employment

Industry of employment

Education & healthcare 22.6%

Arts, food & hospitality 19.4%

Transportation & utilities 10.7%

Public administration 10.6%

Information 9.8%

Professional & management 9.5%

Finance & real estate 5.6%

Retail trade 4.1%

Construction 3.7%

Other services 3.3%

Manufacturing 0.8%

Occupation

Category	%
Management, business & arts	41.6%
Service	23.9%
Sales & office	24.4%
Natural resources & construction	4.4%
Production & transportation	5.7%

Employment type

Type	%
Private sector	49.7%
Government	44.6%
Self-employed	5.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	66.9%
Carpool	12.7%
Public transit	0.0%
Walk	7.1%
Work from home	5.0%
Other means	8.4%
Avg commute (minutes)	19.0

Poverty

All people 20.3%

Under 18 years 21.3%

18 and over 20.2%

Married-couple families 6.0%

Female-led households 36.1%

Income support

Source	% of households
Social Security	53.4%
Retirement income	41.5%
Supplemental Security	9.9%
Cash public assistance	1.8%
Food stamps / SNAP	18.7%

Health indicators

Condition	%
Obesity	33.7%
High blood pressure	41.8%
High cholesterol	37.4%
Diabetes	16.4%
Heart disease	10.9%
Stroke	5.6%
Asthma	12.4%
Arthritis	33.8%
Kidney disease	5.4%
Pulmonary disease	11.5%
Cancer	8.4%

Behavior / access	%
Smoking	23.4%
Binge drinking	12.7%
No physical activity	32.5%
Less than 7 hrs sleep	35.6%
Depression	22.3%
Fair or poor health	25.9%
Poor mental health	16.8%
Poor physical health	16.9%
No health insurance	19.9%
Visited doctor (checkup)	76.4%
Visited dentist	47.7%
Cholesterol screening	89.4%
Teeth loss	20.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	529	16.6%

Disability	%
Any disability	29.1%
Under 18	8.2%
18–64 years	16.9%
65 and over	54.6%

Health insurance coverage

Type	%
Private insurance	57.5%
Public insurance	60.9%
No insurance	10.1%
Uninsured under 19	2.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,576	98.8%
Spanish	111	3.1%
Other Indo-European	68	1.9%
Asian & Pacific Islander	0	0.0%
Other languages	20	0.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,461	95.6%
Born in same state	3,402	94.0%
Born in different state	1,630	45.0%
Foreign born	59	1.6%
Naturalized citizen	160	4.4%
Not a US citizen	109	68.1%

Ancestry

Ancestry	Count	%
French	491	13.6%
Italian	261	7.2%
Arab	213	5.9%

Ancestry	Count	%
Polish	32	0.9%
English	17	0.5%
Dutch	14	0.4%

Technology access

Metric	% of households
Computer access	48.0%
Internet access	79.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 85321

What city is ZIP code 85321 in?

ZIP code 85321 is primarily assigned to Ajo, Arizona.

What county is ZIP code 85321 in?

ZIP code 85321 falls within Pima County, Arizona.

Does ZIP code 85321 have an older population?

35% of residents in ZIP code 85321 are 65 or older, above the national average of ~17%.

Does ZIP code 85321 have a large retiree population?

53% of households in ZIP code 85321 receive Social Security income, suggesting a significant retiree or disability population.

What is the poverty rate in ZIP code 85321?

20% of residents in ZIP code 85321 live below the poverty line, above the national average.

Does ZIP code 85321 have a large veteran population?

17% of civilians in ZIP code 85321 are veterans, above the national average of ~7%.

What timezone is ZIP code 85321 in?

ZIP code 85321 observes the MST timezone.