Loma Mar, CA · standard
ZIP Code 94021
San Mateo County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 192
- 16/sq mi Moderate-density area
- $250,000+
- Median income Above-median income area
- $1,073,100
- Median home value Above-median home value
- 71.0%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Loma Mar pairs a top-decile household income with top-decile home values, in a rural, homeowner-dominated area.
- Top 1%
- household income, US ZIPs
- Top 2%
- home value, US ZIPs
- 16
- people per sq mi
- 72%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 94021 against every reporting US ZIP.
ZIP code 94021 is a sparsely populated ZIP (a standard USPS delivery area) in Loma Mar, San Mateo County, California, home to just 192 residents across 11.8 square miles, a density of 16 people per square mile, in the Los Angeles time zone.
ZIP 94021 skews affluent, with a median household income of $250,000+ (146% above the average California ZIP), while per-capita income is $114,055. Both reported hardship measures are comparatively low in absolute terms: poverty is 0.0% and unemployment is 0.0%. Housing is both higher-cost and owner-heavy: median home value is $1,073,100 (39% above the average California ZIP), while 71.9% of occupied homes are owner-occupied.
This is a highly-educated ZIP: 71.0% of adults hold a bachelor's degree or higher, the median age is 46.8, and the average commute is -. The page also surfaces 9 ZIP codes within roughly 10 miles and 6 more in San Mateo County, so 94021 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 →
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 94021, Loma Mar, 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
192
Population
11.8
Area (sq mi)
16
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 94021?
46.8
Median Age
53.6%
Male
46.4%
Female
0.0%
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?
$250,000+
Median Household Income
+146% vs state ZIP avg
$114,055
Per Capita Income
0.0%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 94021 ranks among California ZIPs
Loma Mar, 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)
$250,000 Top 1% higher than 99% 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
140housing units
140
Total Housing Units
128
Occupied Units
12
Vacant Units
2.51
Avg Household Size
Occupancy Type
$1,073,100
Median Home Value
+39% vs state ZIP avg
1938
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 8 business establishments in ZIP 94021, employing approximately 42 people with a combined annual payroll of $2,797,000.
8
Businesses
42
Employees
$2.8M
Annual Payroll
2
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Accommodation and food services | 4 | 50.0% |
| Construction | 3 | 37.5% |
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 94021 vs 94020 →
ZIP 94021 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94306
Palo Alto (94306)
26,469 residents
- 94022
Los Altos (94022)
18,500 residents
- 94305
Stanford (94305)
13,862 residents
- 95006 8,979
Boulder Creek (95006)
8,979 residents
- 94028 6,534
Portola Valley (94028)
6,534 residents
- 94304 3,627
Palo Alto (94304)
3,627 residents
- 94020 1,559
La Honda (94020)
1,559 residents
- 94060 1,554
Pescadero (94060)
1,554 residents
- 94074 214
San Gregorio (94074)
214 residents
What this shows Among its immediate neighbors, ZIP 94021 ranks #0 by population - useful context the national average alone can't give.
ZIP 94021 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94021
Loma Mar (94021)
$250,000 median income
- 94020
La Honda (94020)
$250,000 median income
- 94022
Los Altos (94022)
$250,000 median income
- 94028
Portola Valley (94028)
$250,000 median income
- 94074
San Gregorio (94074)
$250,000 median income
- 94306
Palo Alto (94306)
$210,000 median income
- 94304
Palo Alto (94304)
$154,141 median income
- 94060
Pescadero (94060)
$127,973 median income
- 95006
Boulder Creek (95006)
$102,167 median income
What this shows By household income, ZIP 94021 ranks the highest of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 94020 | La Honda, CA | 1,559 | 3.0 mi |
| 94060 | Pescadero, CA | 1,554 | 4.5 mi |
| 94074 | San Gregorio, CA | 214 | 5.4 mi |
| 94028 | Portola Valley, CA | 6,534 | 8.3 mi |
| 94304 | Palo Alto, CA | 3,627 | 9.7 mi |
| 94022 | Los Altos, CA | 18,500 | 9.6 mi |
| 95006 | Boulder Creek, CA | 8,979 | 10.1 mi |
| 94305 | Stanford, CA | 13,862 | 11.8 mi |
| 94306 | Palo Alto, CA | 26,469 | 13.0 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 94021, both outside CA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
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 94021 in?
ZIP code 94021 (Loma Mar) 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 94021?
ZIP code 94021 in Loma Mar, CA has a population of 192 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 94021?
The median household income in ZIP 94021 is $250,000+, which is 228% above the national average of $76,288.
What is the average home value in ZIP 94021?
The median home value in ZIP 94021 is $1,073,100, which is 286% above the national average of $278,155.
What is the demographic makeup of ZIP 94021?
The largest racial group in ZIP 94021 is White at 91.3%.
How many businesses are in ZIP code 94021?
ZIP code 94021 has 8 business establishments employing approximately 42 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 94021?
In ZIP code 94021, 84.0% of residents aged 25+ have a high school diploma or higher, and 71.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 94021?
In ZIP code 94021, approximately 71.9% of occupied housing units are owner-occupied and 28.1% are renter-occupied, based on Census ACS 2023 data.
Related
Take this with you
What to do with ZIP 94021's numbers, next.
- See how ZIP 94021 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Loma Mar, 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.