PlainZIP

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
$250,000+
Median income
$1,073,100
Median home value
71.0%
Bachelor's or higher

The verdict

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 California average), while per-capita income is $114,055. The poverty rate stands at 0.0% and the unemployment rate at 0.0%. Housing costs here run $1,073,100 for a typical home value (39% above the state average), with rent averaging - a month; 71.9% of 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 -. A geography-based comparison follows: 9 ZIP codes within about 10 miles of 94021, plus 6 more within San Mateo County, give a clearer read than the national average alone.

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

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 94021?

46.8

Median Age

53.6%

Male

46.4%

Female

0.0%

Foreign-Born

White 91.3%
African American 0.0%
Asian 8.7%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 0.0%
Hispanic or Latino 0.0%

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

$114,055

Per Capita Income

0.0%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 94021 ranks nationally

Loma Mar, CA household income vs. every US ZIP code

Median household income, with the Census top-code shown at $250,000+

$250,000 Top 1% higher than 99% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). Below this entry. $180,000–$200,000: 186 US ZIPs (1%). Below this entry. $200,000–$220,000: 324 US ZIPs (1%). This entry sits in this band. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 84.0%
Bachelor's Degree or Higher 71.0%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

140

Total Housing Units

128

Occupied Units

12

Vacant Units

2.51

Avg Household Size

Occupancy Type

Owner 71.9%
Renter 28.1%

$1,073,100

Median Home Value

+39% vs state

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.

residents

What this shows Among its immediate neighbors, ZIP 94021 ranks #0 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 94021 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

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.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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

More ZIP Codes in San Mateo County

94080 standard
South San Francisco, CA
Pop: 63,975
94015 standard
Daly City, CA
Pop: 60,927
94014 standard
Daly City, CA
Pop: 47,014
94303 standard
Palo Alto, CA
Pop: 45,467
94066 standard
San Bruno, CA
Pop: 41,130
94010 standard
Burlingame, CA
Pop: 40,737

Related Areas

San Mateo County Loma Mar, CA California

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.

Read our methodology to see how this data is sourced, computed, and verified.