ZIP Code Tabulation Area · California

ZIP Code 94598: Walnut Creek, CA

ZIP Code 94598 (Walnut Creek, Contra Costa County, California) has an estimated 27,206 residents in 10,828 households. The median household income is $186,225, the median home value is $1,339,900 and the median gross rent is $2,940/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

27,206

Margin of error ±1,217

Median household income

$186,225

Margin of error ±$25,541

Median home value

$1,339,900

Margin of error ±$58,607

Median gross rent

$2,940/mo

Margin of error ±$257

Median age

45.9 yrs

Margin of error ±2.4 yrs

Mean travel time to work

29.2 min

Margin of error ±3.8 min

How ZIP 94598 compares with California and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 9459845.9 yrsCalifornia37.9 yrsUnited States38.9 yrs

Median household income

ZIP 94598$186,225California$99,122United States$80,734

Per capita income

ZIP 94598$95,937California$49,513United States$44,673

Poverty rate

ZIP 945985.4%California12.0%United States12.5%

Unemployment rate

ZIP 945984.7%California6.6%United States5.2%

Bachelor's degree or higher

ZIP 9459873.7%California37.1%United States35.7%

Median home value

ZIP 94598$1,339,900California$734,700United States$332,700

Median gross rent

ZIP 94598$2,940/moCalifornia$2,036/moUnited States$1,413/mo

Owner-occupied homes

ZIP 9459876.3%California55.9%United States65.2%

Mean travel time to work

ZIP 9459829.2 minCalifornia28.7 minUnited States26.4 min

Worked from home

ZIP 9459837.4%California17.2%United States15.1%

All figures for ZIP 94598

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 94598 — ACS 2020–2024 5-year estimates
MeasureZIP 94598Margin of errorCaliforniaUnited States
Total population27,206±1,21739,287,377334,922,499
Median age45.9 yrs±2.4 yrs37.9 yrs38.9 yrs
Households10,828±44613,548,091129,227,496
Median household income$186,225±$25,541$99,122$80,734
Per capita income$95,937±$9,267$49,513$44,673
Poverty rate5.4%±1.8 pts12.0%12.5%
Unemployment rate4.7%±1.6 pts6.6%5.2%
Bachelor's degree or higher73.7%±3.7 pts37.1%35.7%
Median home value$1,339,900±$58,607$734,700$332,700
Median gross rent$2,940/mo±$257$2,036/mo$1,413/mo
Owner-occupied homes76.3%±3.2 pts55.9%65.2%
Mean travel time to work29.2 min±3.8 min28.7 min26.4 min
Worked from home37.4%±4.6 pts17.2%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 94598
GroupZIP 94598CaliforniaUnited States
White alone, not Hispanic or Latino63.7%33.8%57.4%
Black or African American alone, not Hispanic or Latino1.3%5.2%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.2%0.3%0.5%
Asian alone, not Hispanic or Latino16.7%15.3%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.1%0.3%0.2%
Some other race alone, not Hispanic or Latino1.2%0.6%0.6%
Two or more races, not Hispanic or Latino7.1%4.4%4.3%
Hispanic or Latino (of any race)9.8%40.2%19.3%

Where ZIP 94598 is

State
California
Main county
Contra Costa County
Largest overlapping place
Walnut Creek (38% of the ZIP's land area)
Land area
20.61 sq mi· about 1,320 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Contra Costa County

94521 Concord, CA94523 Pleasant Hill, CA94525 Crockett, CA94526 Danville, CA94528 Diablo, CA94530 El Cerrito, CA94531 Antioch, CA94547 Hercules, CA94548 Knightsen, CA94549 Lafayette, CA94553 Martinez, CA94556 Moraga, CA94561 Oakley, CA94563 Orinda, CA94564 Pinole, CA94565 Pittsburg, CA94569 Contra Costa County, CA94572 Rodeo, CA94575 Moraga, CA94582 San Ramon, CA94583 San Ramon, CA94595 Walnut Creek, CA94596 Walnut Creek, CA94597 Walnut Creek, CA

See every ZIP code in California, or compare ZIP 94598 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.