Zip code 94528: Diablo, California

Q: What city is zip code 94528?

94528 is assigned to Diablo, California. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 94528 in?

94528 is in Contra Costa County, California.

Q: What is the population of 94528?

About 1,049 people live in 94528, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 94528?

The median household income in 94528 is $207,500.

Q: What zip codes are near 94528?

The closest zip codes to 94528 are 94526, 94507, 94506, 94570, 94517.

Residential delivery areaContra Costa CountyPacific Time

Population

1,049

Median household income

$208K

U.S. $81K

Median home value

$2M+

U.S. $333K

Median rent

—

U.S. $1,413

Median age

U.S. 38.9

Land area

1.2 sq mi

909 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 94528

94528 is a suburban zip code in Diablo, California (Contra Costa County), covering 1.2 sq mi of land. About 1,049 people live here, or 909 per square mile. The median resident is 43 years old, compared with 38.9 nationally.

The median household earns $207,500 a year, about 2.6× the national median of $80,734. 8.1% of residents live below the poverty line (U.S.: 12.5%). The median home value is $2,000,000+. 100% of occupied homes are lived in by their owners.

80% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 41.8 minutes each way, and 8% of workers work from home. The most common jobs among working residents are in management; business and finance; and computer and math (tech). 22% of them are self-employed (U.S.: 10%).

How 94528 compares

Sorted from highest to lowest national percentile

Median household income$207,500
99th
StrengthU.S. $80,734 · CA $99,12254th of 1,575 in CA
Per capita income$127,901
99th
StrengthU.S. $44,673 · CA $49,51334th of 1,685 in CA
Median home value$2,000,000+
99th
U.S. $332,700 · CA $734,7002nd of 1,586 in CA
Bachelor's degree or higher79.8%
99th
StrengthU.S. 35.7% · CA 37.1%41st of 1,687 in CA
Homeownership rate100%
99th
StrengthU.S. 65.2% · CA 55.9%5th of 1,662 in CA
Broadband access100%
99th
StrengthU.S. 91% · CA 93.5%8th of 1,662 in CA
Tech workers15.4%
99th
U.S. 3.8% · CA 4.4%49th of 1,678 in CA
Average commute41.8 min
98th
WeaknessU.S. 26.4 min · CA 28.7 min81st of 1,584 in CA
Median earnings per worker$102,733
98th
StrengthU.S. $49,666 · CA $52,643107th of 1,658 in CA
Self-employed workers21.6%
98th
U.S. 10% · CA 11.4%199th of 1,678 in CA
Income inequality (Gini)0.527
94th
WeaknessU.S. 0.483 · CA 0.489129th of 1,651 in CA
Veterans11.3%
93rd
U.S. 6.2% · CA 4.3%126th of 1,686 in CA
Residents 65 and older22.6%
85th
U.S. 17.2% · CA 15.7%443rd of 1,688 in CA
Unemployment rate7.1%
80th
WeaknessU.S. 5.2% · CA 6.6%619th of 1,681 in CA
Median age43
77th
U.S. 38.9 · CA 37.9604th of 1,687 in CA
Residents under 1825%
74th
U.S. 22% · CA 22%396th of 1,688 in CA
Foreign-born residents14.4%
63rd
U.S. 14.1% · CA 27%1,075th of 1,688 in CA
Housing vacancy8.4%
63rd
U.S. 10.1% · CA 7.5%689th of 1,664 in CA
Population density909/sq mi
42nd
U.S. 95/sq mi · CA 252/sq mi859th of 1,688 in CA
Diversity index40.3
36th
U.S. 61.4 · CA 69.71,281st of 1,688 in CA
Poverty rate8.1%
32nd
U.S. 12.5% · CA 12%1,118th of 1,666 in CA
Uninsured rate3.9%
21st
U.S. 8.4% · CA 6.6%1,097th of 1,675 in CA
Work from home7.6%
20th
U.S. 15.1% · CA 17.2%1,336th of 1,680 in CA
Population1,049
1st
U.S. 334,922,499 · CA 39,287,3771,410th of 1,688 in CA
Healthcare workers2.5%
1st
U.S. 9.7% · CA 9.4%1,498th of 1,678 in CA
Government workers0%
1st
U.S. 14.5% · CA 14.8%1,638th of 1,678 in CA

Measure	94528	Contra Costa	CA	U.S.	National percentile	Rank in CA
Median household incomeStrength	$207,500	$127,229	$99,122	$80,734	99th	54th of 1,575
Per capita incomeStrength	$127,901	$62,927	$49,513	$44,673	99th	34th of 1,685
Median home value	$2,000,000+	$866,800	$734,700	$332,700	99th	2nd of 1,586
Bachelor's degree or higherStrength	79.8%	45.2%	37.1%	35.7%	99th	41st of 1,687
Homeownership rateStrength	100%	68%	55.9%	65.2%	99th	5th of 1,662
Broadband accessStrength	100%	95.6%	93.5%	91%	99th	8th of 1,662
Tech workers	15.4%	5.3%	4.4%	3.8%	99th	49th of 1,678
Average commuteWeakness	41.8 min	35.3 min	28.7 min	26.4 min	98th	81st of 1,584
Median earnings per workerStrength	$102,733	$67,204	$52,643	$49,666	98th	107th of 1,658
Self-employed workers	21.6%	11.4%	11.4%	10%	98th	199th of 1,678
Income inequality (Gini)Weakness	0.527	0.471	0.489	0.483	94th	129th of 1,651
Veterans	11.3%	4.2%	4.3%	6.2%	93rd	126th of 1,686
Residents 65 and older	22.6%	17.1%	15.7%	17.2%	85th	443rd of 1,688
Unemployment rateWeakness	7.1%	6.5%	6.6%	5.2%	80th	619th of 1,681
Median age	43	40.5	37.9	38.9	77th	604th of 1,687
Residents under 18	25%	22%	22%	22%	74th	396th of 1,688
Foreign-born residents	14.4%	26.6%	27%	14.1%	63rd	1,075th of 1,688
Housing vacancy	8.4%	3.5%	7.5%	10.1%	63rd	689th of 1,664
Population density	909/sq mi	1,625/sq mi	252/sq mi	95/sq mi	42nd	859th of 1,688
Diversity index	40.3	73.3	69.7	61.4	36th	1,281st of 1,688
Poverty rate	8.1%	8.4%	12%	12.5%	32nd	1,118th of 1,666
Uninsured rate	3.9%	4.6%	6.6%	8.4%	21st	1,097th of 1,675
Work from home	7.6%	21.3%	17.2%	15.1%	20th	1,336th of 1,680
Population	1,049	1,165,012	39,287,377	334,922,499	1st	1,410th of 1,688
Healthcare workers	2.5%	9.2%	9.4%	9.7%	1st	1,498th of 1,678
Government workers	0%	14.6%	14.8%	14.5%	1st	1,638th of 1,678

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

18%

5–17

18–24

25–34

27%

35–44

45–54

15%

55–64

65–74

21%

75+

Median age

Under 18

25%

65 and over

22.6%

Race and ethnicity

White76%
Black0%
Hispanic8%
Asian6%
Native American0%
Pacific Islander0%
Other8%
Multiracial2%

Diversity index

40.3

U.S. 61.4

Foreign-born

14.4%

U.S. 14.1%

Born in state

52%

Language spoken at home (households)

English only

83%

Spanish

Other Indo-European

Asian / Pacific

Other

Households

Households: 424
Average household size: 2.5
Family households: 79.7%
Married couples: 73.6%
Living alone: 20.3%
Veterans (of adults): 11.3%
Male / female: 43% / 57%

Income and poverty

Household income distribution

<$25k

16%

$25–50k

$50–75k

$75–100k

$100–150k

$150–200k

16%

$200k+

50%

Median household income

94528

$207,500

Contra Costa Co.

$127,229

California

$99,122

United States

$80,734

Per capita income

$127,901

U.S. $44,673

Poverty rate

8.1%

U.S. 12.5%

Households earning $150K+

65.6%

U.S. 23%

Income inequality (Gini)

0.527

U.S. 0.483

Housing

Median home value

94528

$2,000,000+

Contra Costa Co.

$866,800

California

$734,700

United States

$332,700

Median gross rent

94528

—

Contra Costa Co.

$2,375

California

$2,036

United States

$1,413

Types of housing

Single-family

100%

2–4 units

5–19 units

20+ units

Mobile home

Boat, RV, van

Housing units: 463
Owner-occupied: 100%
Vacant: 8.4%
Median year built: 1980
Median rooms: 8.4
Renters paying 30%+ of income: —
Renters paying 50%+ of income: —
Home value to income: 9.6× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

54%

Carpooled

18%

Transit

10%

Walked

11%

Bicycle

Worked from home

Other

Commute time (one way)

<10 min

11%

10–19

15%

20–29

30–44

19%

45–59

18%

60+

30%

Average commute

41.8 min

U.S. 26.4 min

Unemployment

7.1%

U.S. 5.2%

In labor force

52.1%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

24%

Business and finance

16%

Computer and math

15%

Legal and social services

13%

Sales

Office and admin

Arts, media and sports

Engineering and science

Healthcare

Education

Police and fire

Food service

Cleaning and personal care

Construction and repair

Farming, fishing and forestry

Production

Transportation and moving

Industries

Construction

25%

Professional and technical services

16%

Arts and recreation

13%

Manufacturing

11%

Information

10%

Finance, insurance and real estate

Wholesale

Health care and social assistance

Admin, support and management

Education

Retail

Restaurants and hotels

Transportation, warehousing and utilities

Public administration

Other services

Agriculture and mining

Median earnings per worker

$102,733

U.S. $49,666

Self-employed

21.6%

U.S. 10%

Government workers

U.S. 14.5%

Nonprofit workers

U.S. 8.8%

Median earnings by type of work

Type of work	94528	U.S.
Management, business, science and arts	$104,593	$74,888
Service	—	$26,804
Sales and office	—	$40,476
Construction and maintenance	—	$49,199
Production and transportation	—	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

Some college

14%

Associate's

Bachelor's

21%

Graduate

59%

High school graduate or higher: 100%
Bachelor's degree or higher: 79.8%
Graduate or professional degree: 59.1%
Households with broadband: 100%
Cable, fiber or DSL: 91%
No internet access: 0%
Without health insurance: 3.9%
Limited-English households: 0%

Geography

City (USPS): Diablo
State: California
County: Contra Costa County
Center point: 37.8415° N, 121.9582° W
Land area: 1.2 sq mi
Water area: under 0.1 sq mi
Time zone: Pacific Time (UTC-8, UTC-7 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Diablo (unincorporated)100% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 94528

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
94526	Danville, CA	2.3 mi	32,584	$225,097	$1,677,700
94507	Alamo, CA	2.8 mi	14,586	$250,000+	$2,000,000+
94506	Danville, CA	3.9 mi	27,055	$250,000+	$1,956,800
94570	Moraga, CA · PO box	4.4 mi	—	—	—
94517	Clayton, CA	4.9 mi	12,316	$168,921	$1,032,100
94583	San Ramon, CA	5.1 mi	39,583	$184,898	$1,383,600
94596	Walnut Creek, CA	5.4 mi	23,417	$135,635	$1,277,800
94582	San Ramon, CA	5.8 mi	47,424	$214,677	$1,635,700
94598	Walnut Creek, CA	6.1 mi	27,206	$186,225	$1,339,900
94588	Pleasanton, CA	6.2 mi	34,328	$191,073	$1,384,300
94595	Walnut Creek, CA	6.4 mi	16,988	$100,552	$860,600
94521	Concord, CA	7.7 mi	41,909	$125,899	$853,200

Zip codes like 94528 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 94528

What city is zip code 94528?

94528 is assigned to Diablo, California. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 94528 in?

94528 is in Contra Costa County, California.

What is the population of 94528?

About 1,049 people live in 94528, according to the Census Bureau's American Community Survey.

What time zone is 94528 in?

94528 is in Pacific Time.

What is the median household income in 94528?

The median household income in 94528 is $207,500.

What zip codes are near 94528?

The closest zip codes to 94528 are 94526, 94507, 94506, 94570, 94517.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 94528, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.