85371 ZIP Code — Poston, AZ

La Paz County, Arizona

ZIP code 85371 is located in Poston, Arizona, within La Paz County. It covers approximately 9.30 square miles and serves a population of 206 residents. This is a standard ZIP code in the Mountain (MT) — no DST timezone, served by area code 928.

About ZIP code 85371

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Renters make up the majority at 73%, typical of denser urban areas.

The dominant occupation class is service, with agriculture and mining as the leading industry.

Health indicators show elevated rates of smoking (28%) compared to national benchmarks. 39% of residents lack health insurance, above the national average.

Overall, ZIP code 85371 reflects a community defined by economic challenges above the national average and elevated reliance on food assistance.

206

population

9.30

sq mi land

Standard

ZIP type

Mountain (MT) — no DST

timezone

85371 ZIP code map

Cities in ZIP code 85371

Below are the cities the US Postal Service accepts for ZIP code 85371. Using any city not on this list may result in mail delivery delays.

City	Status
Poston	Acceptable

Demographics updated 06/2026

Population
Total population	206
Population density	22 / sq mi
State FIPS	04
County FIPS	012

Geography
Land area	9.30 sq mi
Water area	0.00 sq mi
Latitude	33.9865
Longitude	-114.3964
Timezone	Mountain (MT) — no DST
Area code	928

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	74.3%	64.0%	40.6%
$50k – $100k	25.7%	27.1%	31.9%
$100k – $200k	0.0%	7.4%	21.1%
Over $200k	0.0%	1.6%	6.4%

Demographics & statistics

206

Population

People per sq mi

27.3

Median age

Median household income

$14,501

Per capita income

Median home value

$347

Median monthly rent

26.7%

Home ownership

47.1%

Poverty rate

2.2%

Unemployment

Housing units

0.0%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

55–59

65–74

← Male

Female →

Age summary

Group	Count	%
Under 18	88	42.7%
18 and over	118	57.3%
65 and over	10	4.9%
Median age	27.3 years

Race & ethnicity

American Indian / Alaska Native 96.1%

White 3.9%

Group	Count	%
American Indian / Alaska Native	198	96.1%
White	8	3.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	74.3%	64.0%	40.6%
$50k – $100k	25.7%	27.1%	31.9%
$100k – $200k	0.0%	7.4%	21.1%
Over $200k	0.0%	1.6%	6.4%

Under $10k 21.1%

$10k–$15k 6.7%

$15k–$25k 35.6%

$35k–$50k 11.1%

$50k–$75k 25.6%

Range	% of households
Under $10k	21.1%
$10k–$15k	6.7%
$15k–$25k	35.6%
$35k–$50k	11.1%
$50k–$75k	25.6%
Median income	$0

Housing

Home values

Under $50k 41.7%

$100k–$150k 58.3%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$347
Owner occupied	26.7%
Renter occupied	73.3%
Vacant	5.3%
Single-family detached	74.7%
Large apartment buildings	20.0%
Mobile homes	5.3%
Median rooms	4.2
Avg household size (owned)	2.46

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	0.0%
1980–1989	33.7%
1970–1979	35.8%
1960–1969	0.0%
1950–1959	20.0%
1940–1949	10.5%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	40.0%
3 bedrooms	45.3%
4 bedrooms	0.0%
5+ bedrooms	14.7%

Vehicles per household

Vehicles	% of households
No vehicle	56.7%
1 vehicle	6.7%
2 vehicles	21.1%
3 or more	15.6%

Heating fuel

Fuel type	%
Electricity	100.0%

Households & families

Household type	Count	%
Married-couple family	14	15.6%
Cohabiting couple	9	10.0%
Male householder, no spouse	42	46.7%
Female householder, no spouse	25	27.8%
Households with children under 18	42	46.7%
Households with seniors (65+)	10	11.1%
Average household size	2.29

Marital status

Status	Male	Female
Never married	71.8%	81.0%
Married	16.5%	16.7%
Separated	0.0%	0.0%
Widowed	0.0%	2.4%
Divorced	11.8%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 21.6%

HS graduate 50.9%

Some college, no degree 27.6%

Associate's degree 0.0%

Bachelor's degree 0.0%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	78.4%
Bachelor's or higher	0.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	15	26.8%
Elementary school	23	41.1%
High school	18	32.1%
College / grad school	0	0.0%

Employment

Industry of employment

Agriculture & mining 62.9%

Arts, food & hospitality 30.3%

Professional & management 6.7%

Occupation

Category	%
Management, business & arts	15.7%
Service	48.3%
Sales & office	0.0%
Natural resources & construction	36.0%
Production & transportation	0.0%

Employment type

Type	%
Private sector	30.3%
Government	47.2%
Self-employed	22.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	64.0%
Carpool	0.0%
Public transit	0.0%
Walk	36.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 47.1%

Under 18 years 71.6%

18 and over 28.8%

Married-couple families 0.0%

Female-led households 100.0%

Income support

Source	% of households
Social Security	11.1%
Retirement income	6.7%
Supplemental Security	6.7%
Cash public assistance	0.0%
Food stamps / SNAP	31.1%

Health indicators

Condition	%
Obesity	40.3%
High blood pressure	31.4%
High cholesterol	28.2%
Diabetes	14.5%
Heart disease	7.1%
Stroke	4.1%
Asthma	12.3%
Arthritis	20.8%
Kidney disease	3.9%
Pulmonary disease	8.1%
Cancer	4.1%

Behavior / access	%
Smoking	27.6%
Binge drinking	16.2%
No physical activity	36.8%
Less than 7 hrs sleep	38.3%
Depression	21.1%
Fair or poor health	27.7%
Poor mental health	20.0%
Poor physical health	16.0%
No health insurance	32.7%
Visited doctor (checkup)	65.7%
Visited dentist	38.7%
Cholesterol screening	81.8%
Teeth loss	27.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	10	8.5%

Disability	%
Any disability	2.9%
Under 18	0.0%
18–64 years	5.6%
65 and over	0.0%

Health insurance coverage

Type	%
Private insurance	0.0%
Public insurance	61.2%
No insurance	38.8%
Uninsured under 19	28.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	170	82.5%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	206	100.0%
Born in same state	206	100.0%
Born in different state	93	45.1%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	8	3.9%

Technology access

Metric	% of households
Computer access	43.7%
Internet access	100.0%

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

Frequently asked questions about ZIP code 85371

What city is ZIP code 85371 in?

ZIP code 85371 is primarily assigned to Poston, Arizona.

What county is ZIP code 85371 in?

ZIP code 85371 falls within La Paz County, Arizona.

What is the poverty rate in ZIP code 85371?

47% of residents in ZIP code 85371 live below the poverty line, above the national average.

Is ZIP code 85371 family-oriented?

43% of residents in ZIP code 85371 are under 18, reflecting a younger, family-oriented community.

Is ZIP code 85371 mostly rentals?

73% of occupied units in ZIP code 85371 are renter-occupied.

What is the population of ZIP code 85371?

ZIP code 85371 has an estimated population of 206 residents, with a density of 22 people per square mile.

What timezone is ZIP code 85371 in?

ZIP code 85371 observes the MST timezone.