Residential delivery area · California
ZIP Code 94596: Walnut Creek, CA
ZIP code 94596 is in Walnut Creek, California, entirely in Contra Costa County (Census 2020 ZIP-county file). About 23,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of Walnut Creek's 4 residential ZIP codes. Median household income is $135,635 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Walnut Creek (81%) and San Miguel (17%); 1% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Walnut Creek · 4 residential ZIPs
- County
- Contra Costa County
- Census places
- Walnut Creek (81%); San Miguel (17%) census-designated place
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-10 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 6.1 sq mi · 3,863 people per sq mi
Where is ZIP code 94596?
94596 centers on 37.889°, -122.037° and covers 6.1 square miles of land. It borders 4 ZIP codes: 94595, 94598, 94597, 94507.
The map draws ZIP code areas only. For the streets inside 94596, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 94596 compare with the rest of Walnut Creek?
| Measure | 94596 | In Walnut Creek | In Contra Costa County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 23,417 | 2nd of 4 | 27th of 48 | 752nd of 1,802 |
| Median household income | $136k | 2nd of 4 | 19th of 41 | 234th of 1,189 |
| Median home value | $1.28M | 2nd of 4 | 15th of 43 | 191st of 1,317 |
Its median household income is higher than in 94% of U.S. residential ZIP codes, and it is denser than 91% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 94596?
The 2020 Census counted 22,861 people in 94596; the ACS, which samples households over 2020-2024, estimates 23,417. Between the 2010 and 2020 censuses its population grew 14.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 23,417
- 2020 Census count
- 22,861+14.1% since 2010 (20,037)
- Households
- 11,009
- Median age
- 37.1
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 94596?
Of the 23,417 people the ACS estimates in 94596, 14.8% are under 18 and 17.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (60.1%), then Asian (not Hispanic) (16.1%).
- Under 1814.8%
- 18 to 6467.3%
- 65 and older17.9%
- White, not Hispanic60.1%
- Asian, not Hispanic16.1%
- Hispanic or Latino13.2%
- Other or two or more8.8%
- Black, not Hispanic1.9%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 94596 earn?
Median household income is $135,635 (ACS 2020-2024), the 19th highest of the 41 ranked ZIP codes in Contra Costa County. It is not measurably different from 2015-2019 ($133,947 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $135,635
- Income per person
- $88,540
- Below the poverty line
- 6.5%
- Unemployed (of the labor force)
- 6.3%
- Adults 25+ with a bachelor's degree
- 71.2%
- Adjusted gross income per tax return, 2022
- $187,40011,530 returns; wages 62% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 94596?
FHFA's house price index for 94596, built from repeat sales and appraisals of the same homes, rose 53% from 2015 to 2025 and rose 32% from 2020 to 2025.
- Median home value (owners' estimate)
- $1,277,800
- Median gross rent
- $2,574
- Homes owned by their occupants
- 43.6%
- Housing units
- 11,461
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 94596?
2,061 business establishments had a location in this ZIP code in 2023, 47 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services477
- Finance and insurance297
- Health care and social assistance239
- Retail trade206
- Real estate and rental and leasing173
- Other services (except public administration)164
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 94596?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94595 | Walnut Creek | 16,988 | $101k | 2.1 mi |
| 94598 | Walnut Creek | 27,206 | $186k | 2.3 mi |
| 94597 | Walnut Creek | 23,129 | $132k | 2.8 mi |
| 94507 | Alamo | 14,586 | $250k+ | 2.9 mi |
| 94518 | Concord | 27,345 | $112k | 4.3 mi (near) |
| 94549 | Lafayette | 28,420 | $235k | 4.6 mi (near) |
| 94523 | Pleasant Hill | 34,592 | $143k | 5.0 mi (near) |
| 94575 | Moraga | 975 | – | 5.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.