Residential delivery area · California
ZIP Code 94303: Palo Alto, CA
ZIP code 94303 is in Palo Alto, California, mostly in Santa Clara County (67% of its land) with the rest in San Mateo County (Census 2020 ZIP-county file). About 47,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Palo Alto's 4 residential ZIP codes. Median household income is $151,609 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Palo Alto (61%), East Palo Alto (30%) and Mountain View (6%), and 3% in smaller places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Palo Alto · 4 residential ZIPs
- County
- Santa Clara County (67%); San Mateo County (33%)
- Census places
- Palo Alto (61%); East Palo Alto (30%); Mountain View (6%)
- Neighborhoods
- Adobe Meadow, Charleston Gardens, Duveneck, Embarcadero Oaks, Leland Manor, Meadow Park and 3 more GeoNames
- Metro area
- San Jose-Sunnyvale-Santa Clara, CA
- House districts
- CA-16 (67%), CA-15 (33%) 119th Congress, by share of land
- State
- California
- Time zone
- Pacific
- Land area
- 8.4 sq mi · 5,555 people per sq mi
Where is ZIP code 94303?
94303 centers on 37.458°, -122.115° and covers 8.4 square miles of land plus 0.1 of water. It borders 4 ZIP codes: 94301, 94306, 94025, 94043.
The map draws ZIP code areas only. For the streets inside 94303, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 94303 compare with the rest of Palo Alto?
| Measure | 94303 | In Palo Alto | In Santa Clara County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 46,879 | 1st of 4 | 21st of 63 | 266th of 1,802 |
| Median household income | $152k | 4th of 4 | 39th of 57 | 152nd of 1,189 |
| Median home value | $1.83M | 4th of 4 | 17th of 58 | 80th of 1,317 |
Its median household income is higher than in 96% of U.S. residential ZIP codes, and it is denser than 95% 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 94303?
The 2020 Census counted 48,281 people in 94303; the ACS, which samples households over 2020-2024, estimates 46,879. Between the 2010 and 2020 censuses its population grew 6.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 46,879
- 2020 Census count
- 48,281+6.2% since 2010 (45,467)
- Households
- 14,466
- Median age
- 39.5
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 94303?
Of the 46,879 people the ACS estimates in 94303, 22.3% are under 18 and 13.7% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (38.2%), then Asian (not Hispanic) (23.2%).
- Under 1822.3%
- 18 to 6464.0%
- 65 and older13.7%
- Hispanic or Latino38.2%
- Asian, not Hispanic23.2%
- White, not Hispanic22.0%
- Other or two or more10.0%
- Black, not Hispanic6.6%
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 94303 earn?
Median household income is $151,609 (ACS 2020-2024), the 39th highest of the 57 ranked ZIP codes in Santa Clara County. It rose from $129,770 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $151,609
- Income per person
- $72,225
- Below the poverty line
- 7.1%
- Unemployed (of the labor force)
- 6.0%
- Adults 25+ with a bachelor's degree
- 49.2%
- Adjusted gross income per tax return, 2022
- $217,77021,060 returns; wages 72% 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 94303?
FHFA's house price index for 94303, built from repeat sales and appraisals of the same homes, rose 72% from 2015 to 2025 and rose 31% from 2020 to 2025, and moved −1.8% in 2025.
- Median home value (owners' estimate)
- $1,826,200
- Median gross rent
- $2,771
- Homes owned by their occupants
- 57.8%
- Housing units
- 15,891
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 94303?
989 business establishments had a location in this ZIP code in 2023, 22 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services248
- Health care and social assistance100
- Construction94
- Real estate and rental and leasing73
- Other services (except public administration)67
- Administrative and support and waste management and remediation services65
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 94303?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94301 | Palo Alto | 17,508 | $242k | 2.1 mi |
| 94306 | Palo Alto | 27,183 | $210k | 3.0 mi |
| 94025 | Menlo Park | 40,721 | $217k | 3.7 mi |
| 94043 | Mountain View | 33,176 | $203k | 4.1 mi |
| 94305 | Stanford | 18,509 | $83k | 4.1 mi (near) |
| 94027 | Atherton | 7,002 | $250k+ | 4.7 mi (near) |
| 94063 | Redwood City | 34,433 | $117k | 5.0 mi (near) |
| 94304 | Palo Alto | 5,000 | $154k | 5.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.