85378 ZIP Code — Surprise, AZ

Maricopa County, Arizona

ZIP code 85378 is located in Surprise, Arizona, within Maricopa County. It covers approximately 3.60 square miles and serves a population of 9,226 residents. This is a po box ZIP code in the Mountain (MT) — no DST timezone, served by area code 623.

About ZIP code 85378

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $215,500. Owner-occupancy sits near the national average at 62%.

Median household income is $63,102. Poverty affects 18% of residents, above the national average. 43% 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 28 minutes is near the national average.

College attainment at 18% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 85378 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, and a significant Social Security-dependent population.

9,226

population

3.60

sq mi land

PO Box

ZIP type

Mountain (MT) — no DST

timezone

85378 ZIP code map

Cities in ZIP code 85378

Below are the cities the US Postal Service accepts for ZIP code 85378. Using any city not on this list may result in mail delivery delays.

City	Status
Surprise	Acceptable

Demographics updated 06/2026

Population
Total population	9,226
Population density	2,563 / sq mi
State FIPS	04
County FIPS	013

Geography
Land area	3.60 sq mi
Water area	0.00 sq mi
Latitude	33.6656
Longitude	-112.3544
Timezone	Mountain (MT) — no DST
Area code	623

Total population by age

Gender

Race & ethnicity

Demographics & statistics

9,226

Population

2,563

People per sq mi

41.5

Median age

$63,102

Median household income

$29,694

Per capita income

$215,500

Median home value

$1,216

Median monthly rent

61.6%

Home ownership

17.7%

Poverty rate

6.3%

Unemployment

3,192

Housing units

18.4%

Bachelor's or higher

Age distribution

Male Female

309

Under 5

395

171

5–9

217

246

10–14

314

203

15–19

258

175

20–24

224

613

25–34

782

483

35–44

616

486

45–54

620

208

55–59

265

294

60–64

375

402

65–74

513

371

75–84

474

85+

119

← Male

Female →

Age summary

Group	Count	%
Under 18	1,932	20.9%
18 and over	7,294	79.1%
65 and over	1,972	21.4%
Median age	41.5 years

Race & ethnicity

White 55.8%

Hispanic or Latino 18.1%

Two or more races 15.7%

Black or African American 4.9%

Other race 4.4%

American Indian / Alaska Native 1%

Asian 0.2%

Group	Count	%
White	6,281	55.8%
Hispanic or Latino	2,037	18.1%
Two or more races	1,771	15.7%
Black or African American	553	4.9%
Other race	491	4.4%
American Indian / Alaska Native	108	1%
Asian	22	0.2%

Household income

Under $10k 6.1%

$10k–$15k 5.2%

$15k–$25k 7.5%

$25k–$35k 8.9%

$35k–$50k 14.0%

$50k–$75k 22.9%

$75k–$100k 14.3%

$100k–$150k 13.7%

$150k–$200k 5.9%

$200k+ 1.6%

Range	% of households
Under $10k	6.1%
$10k–$15k	5.2%
$15k–$25k	7.5%
$25k–$35k	8.9%
$35k–$50k	14.0%
$50k–$75k	22.9%
$75k–$100k	14.3%
$100k–$150k	13.7%
$150k–$200k	5.9%
$200k+	1.6%
Median income	$63,102

Housing

Home values

Under $50k 25.3%

$50k–$100k 11.4%

$100k–$150k 6.9%

$150k–$200k 4.2%

$200k–$300k 18.5%

$300k–$500k 29.6%

$500k–$1M 2.3%

$1M+ 1.8%

Housing overview

Metric	Value
Median home value	$215,500
Median rent / month	$1,216
Owner occupied	61.6%
Renter occupied	38.4%
Vacant	17.7%
Single-family detached	49.6%
Large apartment buildings	2.8%
Mobile homes	29.5%
Median rooms	4.6
Avg household size (owned)	2.21

Year built

Era	%
2020 or later	1.0%
2010–2019	4.2%
2000–2009	28.1%
1990–1999	38.6%
1980–1989	19.9%
1970–1979	5.9%
1960–1969	0.9%
1950–1959	0.6%
1940–1949	0.8%
1939 or earlier	0.1%

Bedrooms

Size	% of units
No bedroom (studio)	3.5%
1 bedroom	28.6%
2 bedrooms	23.9%
3 bedrooms	28.5%
4 bedrooms	15.0%
5+ bedrooms	0.5%

Vehicles per household

Vehicles	% of households
No vehicle	6.2%
1 vehicle	48.2%
2 vehicles	35.2%
3 or more	10.4%

Heating fuel

Fuel type	%
Utility gas	23.3%
Electricity	72.0%
Propane / LP gas	0.3%
Wood	1.2%
Solar	1.6%
No fuel used	1.5%

Households & families

Household type	Count	%
Married-couple family	1,379	35.9%
Cohabiting couple	309	8.0%
Male householder, no spouse	854	22.2%
Female householder, no spouse	1,300	33.8%
Households with children under 18	1,219	31.7%
Households with seniors (65+)	1,429	37.2%
Average household size	2.38

Marital status

Status	Male	Female
Never married	34.7%	27.0%
Married	46.7%	40.8%
Separated	3.1%	1.2%
Widowed	3.0%	8.7%
Divorced	12.4%	22.3%

Education

Less than 9th grade 2.7%

Some HS, no diploma 11.6%

HS graduate 31.3%

Some college, no degree 24.2%

Associate's degree 11.7%

Bachelor's degree 7.6%

Graduate / professional 10.8%

Metric	%
HS diploma or higher	85.6%
Bachelor's or higher	18.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	182	10.3%
Kindergarten	46	2.6%
Elementary school	809	45.6%
High school	389	21.9%
College / grad school	347	19.6%

Employment

Industry of employment

Education & healthcare 23.2%

Retail trade 18.5%

Arts, food & hospitality 10.9%

Construction 8.6%

Transportation & utilities 8.4%

Professional & management 7.5%

Manufacturing 6.3%

Finance & real estate 5.1%

Public administration 4.9%

Other services 2.4%

Wholesale trade 2.0%

Information 1.5%

Agriculture & mining 0.6%

Occupation

Category	%
Management, business & arts	27.6%
Service	25.0%
Sales & office	26.8%
Natural resources & construction	7.3%
Production & transportation	13.4%

Employment type

Type	%
Private sector	79.9%
Government	12.0%
Self-employed	8.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	61.7%
Carpool	15.6%
Public transit	0.0%
Walk	2.3%
Work from home	16.8%
Other means	3.6%
Avg commute (minutes)	27.5

Poverty

All people 17.7%

Under 18 years 27.9%

18 and over 15.0%

Married-couple families 5.9%

Female-led households 34.8%

Income support

Source	% of households
Social Security	43.2%
Retirement income	30.0%
Supplemental Security	7.9%
Cash public assistance	4.2%
Food stamps / SNAP	11.7%

Health indicators

Condition	%
Obesity	0.0%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	0.0%
Heart disease	0.0%
Stroke	0.0%
Asthma	0.0%
Arthritis	0.0%
Kidney disease	0.0%
Pulmonary disease	0.0%
Cancer	0.0%

Behavior / access	%
Smoking	0.0%
Binge drinking	0.0%
No physical activity	0.0%
Less than 7 hrs sleep	0.0%
Depression	0.0%
Fair or poor health	0.0%
Poor mental health	0.0%
Poor physical health	0.0%
No health insurance	0.0%
Visited doctor (checkup)	0.0%
Visited dentist	0.0%
Cholesterol screening	0.0%
Teeth loss	0.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	761	10.4%

Disability	%
Any disability	14.2%
Under 18	4.5%
18–64 years	14.8%
65 and over	22.5%

Health insurance coverage

Type	%
Private insurance	59.1%
Public insurance	47.9%
No insurance	8.0%
Uninsured under 19	8.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	8,522	92.4%
Spanish	433	5.1%
Other Indo-European	295	3.5%
Asian & Pacific Islander	10	0.1%
Other languages	30	0.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	8,399	91.0%
Born in same state	8,347	90.5%
Born in different state	3,650	39.6%
Foreign born	52	0.6%
Naturalized citizen	827	9.0%
Not a US citizen	358	43.3%

Ancestry

Ancestry	Count	%
French	828	9%
Italian	763	8.3%
Arab	461	5%
Polish	134	1.5%

Ancestry	Count	%
German	83	0.9%
Irish	53	0.6%
English	42	0.5%
Dutch	29	0.3%

Technology access

Metric	% of households
Computer access	41.6%
Internet access	95.5%

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

Frequently asked questions about ZIP code 85378

What city is ZIP code 85378 in?

ZIP code 85378 is primarily assigned to Surprise, Arizona.

What county is ZIP code 85378 in?

ZIP code 85378 falls within Maricopa County, Arizona.

What is the poverty rate in ZIP code 85378?

18% of residents in ZIP code 85378 live below the poverty line, above the national average.

Does ZIP code 85378 have a large retiree population?

43% of households in ZIP code 85378 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 85378 have a large veteran population?

10% of civilians in ZIP code 85378 are veterans, above the national average of ~7%.

What is the population of ZIP code 85378?

ZIP code 85378 has an estimated population of 9,226 residents, with a density of 2,563 people per square mile.

What timezone is ZIP code 85378 in?

ZIP code 85378 observes the MST timezone.