94598 ZIP Code — Walnut Creek, CA

Contra Costa County, California

ZIP code 94598 is located in Walnut Creek, California, within Contra Costa County. It covers approximately 20.61 square miles and serves a population of 26,346 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 341/510/925.

About ZIP code 94598

The housing stock consists of a mix of housing types. Most homes were built in the 1970s, giving the area an established character. Median home value is $1,235,200. Owner-occupancy sits near the national average at 75%.

The gap between median ($185,995) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 5% is below the national average. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. An above-average commute of 37 minutes suggests many residents work outside the immediate area. Remote work is prevalent — 29% of workers work from home.

Educational attainment is high — 74% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 94598 reflects a community defined by a highly educated population, a high rate of remote workers, and a significant Social Security-dependent population.

26,346

population

20.61

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

94598 ZIP code map

Cities in ZIP code 94598

Below are the cities the US Postal Service accepts for ZIP code 94598. Using any city not on this list may result in mail delivery delays.

City	Status
Walnut Creek	Preferred

Nearby ZIP codes

94596 Walnut Creek (2.4 mi) 94507 Alamo (3.2 mi) 94518 Concord (4.1 mi) 94597 Walnut Creek (4.6 mi) 94597 Walnut Creek (4.6 mi) 94595 Walnut Creek (4.7 mi) 94595 Walnut Creek (4.7 mi) 94521 Concord (5 mi) 94529 Concord (5.8 mi) 94526 Danville (5.9 mi) 94523 Pleasant Hill (6 mi) 94549 Lafayette (6.2 mi)

Demographics updated 05/2026

Population
Total population	26,346
Population density	1,278 / sq mi
State FIPS	06
County FIPS	013

Geography
Land area	20.61 sq mi
Water area	0.01 sq mi
Latitude	37.8994
Longitude	-121.9921
Timezone	Pacific (PT)
Area code	341/510/925

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	14.8%	23.2%	32.6%
$50k – $100k	17.7%	25.1%	27.7%
$100k – $200k	28.2%	31.3%	26.4%
Over $200k	39.4%	20.4%	13.3%

Demographics & statistics

26,346

Population

1,278

People per sq mi

46.4

Median age

$185,995

Median household income

$94,524

Per capita income

$1,235,200

Median home value

$2,926

Median monthly rent

74.7%

Home ownership

4.8%

Poverty rate

3.6%

Unemployment

7,986

Housing units

73.6%

Bachelor's or higher

Age distribution

Male Female

644

Under 5

681

742

5–9

784

682

10–14

721

549

15–19

580

507

20–24

535

1,207

25–34

1,275

1,879

35–44

1,986

1,705

45–54

1,802

953

55–59

1,008

878

60–64

929

1,653

65–74

1,747

879

75–84

930

530

85+

560

← Male

Female →

Age summary

Group	Count	%
Under 18	5,048	19.2%
18 and over	21,298	80.8%
65 and over	6,299	23.9%
Median age	46.4 years

Race & ethnicity

White 60.9%

Asian 15.7%

Two or more races 11.1%

Hispanic or Latino 7.1%

Other race 2.3%

Black or African American 2.2%

Native Hawaiian / Pacific Islander 0.6%

American Indian / Alaska Native 0.2%

Group	Count	%
White	17,253	60.9%
Asian	4,439	15.7%
Two or more races	3,145	11.1%
Hispanic or Latino	2,005	7.1%
Other race	654	2.3%
Black or African American	633	2.2%
Native Hawaiian / Pacific Islander	171	0.6%
American Indian / Alaska Native	51	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	14.8%	23.2%	32.6%
$50k – $100k	17.7%	25.1%	27.7%
$100k – $200k	28.2%	31.3%	26.4%
Over $200k	39.4%	20.4%	13.3%

Under $10k 2.7%

$10k–$15k 3.0%

$15k–$25k 3.0%

$25k–$35k 0.8%

$35k–$50k 4.2%

$50k–$75k 6.5%

$75k–$100k 6.1%

$100k–$150k 14.0%

$150k–$200k 14.4%

$200k+ 45.3%

Range	% of households
Under $10k	2.7%
$10k–$15k	3.0%
$15k–$25k	3.0%
$25k–$35k	0.8%
$35k–$50k	4.2%
$50k–$75k	6.5%
$75k–$100k	6.1%
$100k–$150k	14.0%
$150k–$200k	14.4%
$200k+	45.3%
Median income	$185,995

Housing

Home values

Under $50k 0.5%

$50k–$100k 0.7%

$100k–$150k 1.0%

$150k–$200k 0.1%

$200k–$300k 0.4%

$300k–$500k 2.6%

$500k–$1M 22.5%

$1M+ 72.2%

Housing overview

Metric	Value
Median home value	$1,235,200
Median rent / month	$2,926
Owner occupied	74.7%
Renter occupied	25.3%
Vacant	1.7%
Single-family detached	66.7%
Large apartment buildings	8.6%
Mobile homes	0.5%
Median rooms	6.6
Avg household size (owned)	2.53

Year built

Era	%
2020 or later	0.2%
2010–2019	0.7%
2000–2009	3.0%
1990–1999	7.3%
1980–1989	11.2%
1970–1979	33.9%
1960–1969	27.6%
1950–1959	11.0%
1940–1949	1.4%
1939 or earlier	3.8%

Bedrooms

Size	% of units
No bedroom (studio)	4.2%
1 bedroom	5.6%
2 bedrooms	15.3%
3 bedrooms	28.1%
4 bedrooms	36.3%
5+ bedrooms	10.4%

Vehicles per household

Vehicles	% of households
No vehicle	4.1%
1 vehicle	28.7%
2 vehicles	42.6%
3 or more	24.7%

Heating fuel

Fuel type	%
Utility gas	71.0%
Electricity	26.1%
Propane / LP gas	1.0%
Wood	0.1%
Solar	0.7%
No fuel used	0.9%

Households & families

Household type	Count	%
Married-couple family	6,465	61.9%
Cohabiting couple	442	4.2%
Male householder, no spouse	1,249	12.0%
Female householder, no spouse	2,287	21.9%
Households with children under 18	3,018	28.9%
Households with seniors (65+)	4,262	40.8%
Average household size	2.47

Marital status

Status	Male	Female
Never married	26.6%	23.1%
Married	65.1%	57.6%
Separated	1.1%	1.0%
Widowed	2.4%	10.0%
Divorced	4.8%	8.3%

Education

Less than 9th grade 0.9%

Some HS, no diploma 1.8%

HS graduate 7.6%

Some college, no degree 10.5%

Associate's degree 5.6%

Bachelor's degree 40.7%

Graduate / professional 33.0%

Metric	%
HS diploma or higher	97.3%
Bachelor's or higher	73.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	391	7.2%
Kindergarten	382	7.0%
Elementary school	2,232	41.1%
High school	1,148	21.1%
College / grad school	1,276	23.5%

Employment

Industry of employment

Professional & management 25.4%

Education & healthcare 23.4%

Finance & real estate 12.4%

Arts, food & hospitality 7.6%

Retail trade 7.1%

Manufacturing 5.6%

Transportation & utilities 4.0%

Construction 3.9%

Public administration 3.9%

Information 2.7%

Wholesale trade 1.9%

Other services 1.4%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	71.3%
Service	6.6%
Sales & office	15.7%
Natural resources & construction	1.9%
Production & transportation	4.5%

Employment type

Type	%
Private sector	76.0%
Government	13.4%
Self-employed	10.6%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	48.1%
Carpool	5.8%
Public transit	11.9%
Walk	2.3%
Work from home	29.2%
Other means	2.7%
Avg commute (minutes)	36.6

Poverty

All people 4.8%

Under 18 years 5.4%

18 and over 4.7%

Married-couple families 1.7%

Female-led households 4.3%

Income support

Source	% of households
Social Security	35.6%
Retirement income	29.2%
Supplemental Security	2.5%
Cash public assistance	2.0%
Food stamps / SNAP	2.0%

Health indicators

Condition	%
Obesity	24.0%
High blood pressure	27.8%
High cholesterol	32.3%
Diabetes	8.3%
Heart disease	5.6%
Stroke	2.4%
Asthma	8.4%
Arthritis	23.6%
Kidney disease	2.6%
Pulmonary disease	4.4%
Cancer	8.2%

Behavior / access	%
Smoking	6.7%
Binge drinking	16.3%
No physical activity	13.7%
Less than 7 hrs sleep	26.4%
Depression	14.8%
Fair or poor health	8.8%
Poor mental health	10.4%
Poor physical health	7.3%
No health insurance	5.3%
Visited doctor (checkup)	69.1%
Visited dentist	78.9%
Cholesterol screening	95.0%
Teeth loss	5.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	998	4.7%

Disability	%
Any disability	9.1%
Under 18	1.7%
18–64 years	4.8%
65 and over	25.9%

Health insurance coverage

Type	%
Private insurance	88.0%
Public insurance	26.9%
No insurance	1.5%
Uninsured under 19	0.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	25,021	95.0%
Spanish	2,040	8.2%
Other Indo-European	219	0.9%
Asian & Pacific Islander	886	3.5%
Other languages	800	3.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	20,458	77.7%
Born in same state	19,889	75.5%
Born in different state	12,633	48.0%
Foreign born	569	2.2%
Naturalized citizen	5,888	22.3%
Not a US citizen	4,425	75.2%

Ancestry

Ancestry	Count	%
French	3,648	13.8%
Italian	2,925	11.1%
Arab	569	2.2%
Polish	486	1.8%
English	313	1.2%

Ancestry	Count	%
Dutch	287	1.1%
German	74	0.3%
Irish	47	0.2%
Norwegian	47	0.2%

Technology access

Metric	% of households
Computer access	39.6%
Internet access	97.8%

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

Frequently asked questions about ZIP code 94598

What city is ZIP code 94598 in?

ZIP code 94598 is primarily assigned to Walnut Creek, California.

What county is ZIP code 94598 in?

ZIP code 94598 falls within Contra Costa County, California.

How educated is the population of ZIP code 94598?

74% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Does ZIP code 94598 have a large retiree population?

36% of households in ZIP code 94598 receive Social Security income, suggesting a significant retiree or disability population.

What is the median household income in ZIP code 94598?

The median household income in ZIP code 94598 is $185,995, above the national median of ~$75,000.

What is the typical home value in ZIP code 94598?

The median home value in ZIP code 94598 is $1,235,200.

What timezone is ZIP code 94598 in?

ZIP code 94598 observes the PST timezone.