San Mateo, CA · standard
ZIP Code 94402
San Mateo County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 23,981
- 1,904/sq mi High-density area
- $172,522
- Median income Above-median income area
- $2,000,000+
- Median home value Above-median home value
- 68.6%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
San Mateo pairs a top-decile household income with top-decile home values, in a low-density, mixed-tenure area.
- Top 2%
- household income, US ZIPs
- Top 1%
- home value, US ZIPs
- 1,904
- people per sq mi
- 58%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 94402 against every reporting US ZIP.
ZIP code 94402 is a densely settled ZIP (a standard USPS delivery area) in San Mateo, San Mateo County, California, with 23,981 residents across 12.6 square miles, a density of 1,904 people per square mile, in the Los Angeles time zone.
ZIP 94402 skews affluent, with a median household income of $172,522 (70% above the average California ZIP), while per-capita income is $109,498. The poverty rate is 5.2%, with unemployment at 4.0%; those measures add context to the income figure. Median home value is $2,000,000+ (159% above the average California ZIP) and median rent is $3,501; 58.4% of occupied homes are owner-occupied.
This is a highly-educated ZIP: 68.6% of adults hold a bachelor's degree or higher, the median age is 40.8, and the average commute is 26 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in San Mateo County, so 94402 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 94402
Top 5 sectors by establishment count in San Mateo, CA
Which industries have the most business establishments in ZIP 94402.
- Professional, scientific, and technical services
Professional, scientific, and technical services
263 establishments
- Health care and social assistance
Health care and social assistance
119 establishments
- Finance and insurance 102
Finance and insurance
102 establishments
- Construction 79
Construction
79 establishments
- Other services (except public administration) 76
Other services (except public administration)
76 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 94402, San Mateo, CA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
23,981
Population
12.6
Area (sq mi)
1,904
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 94402?
40.8
Median Age
47.0%
Male
53.0%
Female
27.9%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$172,522
Median Household Income
+70% vs state ZIP avg
$109,498
Per Capita Income
5.2%
Poverty Rate
4.0%
Unemployment Rate
26.2 min
Mean Commute Time
How ZIP 94402 ranks among California ZIPs
San Mateo, CA household income vs. every California ZIP code
Median household income among 1,583 reporting California ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$172,522 Top 8% higher than 92% of 1,583 California ZIPs
Each bar is a $20K-wide band; taller bars hold more California ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
10,764housing units
10,764
Total Housing Units
10,125
Occupied Units
639
Vacant Units
2.50
Avg Household Size
Occupancy Type
$2,000,000+
Median Home Value
+159% vs state ZIP avg
$3,501
Median Rent
1958
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
-10.8%
YoY Change (2021)
163
HPI Index (2000 = 100)
+63%
Total Change Since 2000
Home values in ZIP 94402 have decreased 10.8% over the past year (2021). Since 2000, this ZIP has seen +63% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2017 | +2.5% | 217 |
| 2018 | +4.0% | 225 |
| 2019 | -0.4% | 224 |
| 2020 | -18.3% | 183 |
| 2021 | -10.8% | 163 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2021. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 1,024 business establishments in ZIP 94402, employing approximately 24,824 people with a combined annual payroll of $4,339,223,000.
1,024
Businesses
24,824
Employees
$4.3B
Annual Payroll
16
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 263 | 25.7% |
| Health care and social assistance | 119 | 11.6% |
| Finance and insurance | 102 | 10.0% |
| Construction | 79 | 7.7% |
| Other services (except public administration) | 76 | 7.4% |
| Information | 64 | 6.3% |
| Real estate and rental and leasing | 64 | 6.3% |
| Administrative and support and waste management and remediation services | 60 | 5.9% |
| Wholesale trade | 43 | 4.2% |
| Retail trade | 41 | 4.0% |
| Accommodation and food services | 32 | 3.1% |
| Educational services | 25 | 2.4% |
| Manufacturing | 20 | 1.9% |
| Arts, entertainment, and recreation | 15 | 1.5% |
| Transportation and warehousing | 11 | 1.1% |
| Management of companies and enterprises | 9 | 0.9% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 94402 vs 94403 →
ZIP 94402 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94010
Burlingame (94010)
40,737 residents
- 94403
San Mateo (94403)
39,642 residents
- 94401
San Mateo (94401)
34,429 residents
- 94404
San Mateo (94404)
33,749 residents
- 94070
San Carlos (94070)
29,166 residents
- 94002
Belmont (94002)
25,992 residents
- 94062
Redwood City (94062)
25,876 residents
- 94402
San Mateo (94402)
23,981 residents
- 94030
Millbrae (94030)
21,536 residents
What this shows Among its immediate neighbors, ZIP 94402 ranks #8 by population - useful context the national average alone can't give.
ZIP 94402 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94070
San Carlos (94070)
$240,074 median income
- 94062
Redwood City (94062)
$233,262 median income
- 94065
Redwood City (94065)
$215,955 median income
- 94002
Belmont (94002)
$203,965 median income
- 94010
Burlingame (94010)
$196,882 median income
- 94404
San Mateo (94404)
$192,332 median income
- 94403
San Mateo (94403)
$174,917 median income
- 94402
San Mateo (94402)
$172,522 median income
- 94030
Millbrae (94030)
$163,476 median income
What this shows By household income, ZIP 94402 ranks #8 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 94403 | San Mateo, CA | 39,642 | 1.6 mi |
| 94401 | San Mateo, CA | 34,429 | 2.4 mi |
| 94010 | Burlingame, CA | 40,737 | 2.6 mi |
| 94002 | Belmont, CA | 25,992 | 2.7 mi |
| 94404 | San Mateo, CA | 33,749 | 3.7 mi |
| 94065 | Redwood City, CA | 11,359 | 4.7 mi |
| 94070 | San Carlos, CA | 29,166 | 4.6 mi |
| 94030 | Millbrae, CA | 21,536 | 5.6 mi |
| 94128 | San Francisco, CA | 69 | 6.3 mi |
| 94062 | Redwood City, CA | 25,876 | 8.4 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 94402, both outside CA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (23,981 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in San Mateo County
Related Areas
Frequently Asked Questions
What county is ZIP code 94402 in?
ZIP code 94402 (San Mateo) is located in San Mateo County, California. San Mateo County contains multiple ZIP codes, see the full list at /counties/san-mateo-ca.
What is the population of ZIP code 94402?
ZIP code 94402 in San Mateo, CA has a population of 23,981 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 94402?
The median household income in ZIP 94402 is $172,522, which is 126% above the national average of $76,288.
What is the average home value in ZIP 94402?
The median home value in ZIP 94402 is $2,000,000+, which is 619% above the national average of $278,155.
What is the demographic makeup of ZIP 94402?
The largest racial group in ZIP 94402 is White at 48.9%. Hispanic or Latino residents make up 15.7% of the population.
How many businesses are in ZIP code 94402?
ZIP code 94402 has 1,024 business establishments employing approximately 24,824 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 94402?
The top industries by establishment count in ZIP 94402 are: Professional, scientific, and technical services (263), Health care and social assistance (119), Finance and insurance (102). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 94402?
According to the FHFA House Price Index, home values in ZIP 94402 decreased by 10.8% in 2021. Since 2000, home values in this ZIP have appreciated by approximately 63%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 94402?
In ZIP code 94402, 79.4% of residents aged 25+ have a high school diploma or higher, and 68.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 94402?
The mean commute time for workers in ZIP code 94402 is 26.2 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 94402?
In ZIP code 94402, approximately 58.4% of occupied housing units are owner-occupied and 41.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 94402?
The poverty rate in ZIP code 94402 is 5.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 94402's numbers, next.
- See how ZIP 94402 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where San Mateo, CA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.