PlainZIP

San Marino, CA · standard

ZIP Code 91108

Los Angeles County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

13,361
1,354/sq mi
$204,847
Median income
$2,000,000+
Median home value
82.5%
Bachelor's or higher

The verdict

San Marino pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.

Top 1%
household income, US ZIPs
Top 1%
home value, US ZIPs
1,354
people per sq mi
82%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 91108 against every reporting US ZIP.

ZIP code 91108 is a mid-sized community (a standard USPS delivery area) in San Marino, Los Angeles County, California, home to 13,361 residents across 9.9 square miles, a density of 1,354 people per square mile, in the Los Angeles time zone.

ZIP 91108 skews affluent, with a median household income of $204,847 (101% above the California average), while per-capita income is $101,946. Local economic indicators show a 6.6% poverty rate alongside 5.3% unemployment. Housing costs here run $2,000,000+ for a typical home value (159% above the state average), with rent averaging $3,501 a month; 82.0% of homes are owner-occupied.

This is a highly-educated ZIP: 82.5% of adults hold a bachelor's degree or higher, the median age is 46.1, and the average commute is 27 minutes. To put 91108 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Los Angeles County, for a geography-aware comparison.

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 91108

Top 5 sectors by establishment count in San Marino, CA

Which industries have the most business establishments in ZIP 91108.

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 · ZIP Code Business Patterns (ZBP) As of 2023

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 91108, San Marino, 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

13,361

Population

9.9

Area (sq mi)

1,354

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 91108?

46.1

Median Age

50.3%

Male

49.7%

Female

46.5%

Foreign-Born

White 23.3%
African American 0.1%
Asian 67.5%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 8.0%
Hispanic or Latino 5.4%

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?

$204,847

Median Household Income

+101% vs state

$101,946

Per Capita Income

6.6%

Poverty Rate

5.3%

Unemployment Rate

26.5 min

Mean Commute Time

How ZIP 91108 ranks nationally

San Marino, CA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$204,847 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 86.2%
Bachelor's Degree or Higher 82.5%

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

What does housing look like?

4,567

Total Housing Units

4,038

Occupied Units

529

Vacant Units

3.05

Avg Household Size

Occupancy Type

Owner 82.0%
Renter 18.0%

$2,000,000+

Median Home Value

+159% vs state

$3,501

Median Rent

1943

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

-9.8%

YoY Change (2021)

181

HPI Index (2000 = 100)

+81%

Total Change Since 2000

Home values in ZIP 91108 have decreased 9.8% over the past year (2021). Since 2000, this ZIP has seen +81% cumulative appreciation.

Year Annual Change HPI Index
2017 +4.6% 246
2018 +10.3% 271
2019 -24.6% 204
2020 -1.6% 201
2021 -9.8% 181

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 653 business establishments in ZIP 91108, employing approximately 2,933 people with a combined annual payroll of $177,584,000.

653

Businesses

2,933

Employees

$177.6M

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 136 20.8%
Health care and social assistance 91 13.9%
Real estate and rental and leasing 89 13.6%
Wholesale trade 59 9.0%
Finance and insurance 53 8.1%
Other services (except public administration) 40 6.1%
Retail trade 37 5.7%
Accommodation and food services 29 4.4%
Administrative and support and waste management and remediation services 26 4.0%
Construction 22 3.4%
Educational services 20 3.1%
Information 18 2.8%
Arts, entertainment, and recreation 17 2.6%
Transportation and warehousing 7 1.1%
Manufacturing 5 0.8%
Industries not classified 3 0.5%

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 91108 vs 91106 →

ZIP 91108 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 91108 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 91108 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 91108 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
91106 Pasadena, CA 24,229 1.4 mi
91775 San Gabriel, CA 23,988 1.5 mi
91801 Alhambra, CA 52,735 2.3 mi
91101 Pasadena, CA 20,460 2.2 mi
91776 San Gabriel, CA 38,475 2.5 mi
91104 Pasadena, CA 36,751 3.2 mi
91030 South Pasadena, CA 25,616 2.7 mi
91107 Pasadena, CA 32,940 2.9 mi
91105 Pasadena, CA 11,254 3.2 mi
91007 Arcadia, CA 34,095 3.8 mi

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90201 standard
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90280 standard
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Related Areas

Los Angeles County San Marino, CA California

Frequently Asked Questions

What county is ZIP code 91108 in? ▼
ZIP code 91108 (San Marino) is located in Los Angeles County, California. Los Angeles County contains multiple ZIP codes, see the full list at /counties/los-angeles-ca.
What is the population of ZIP code 91108? ▼
ZIP code 91108 in San Marino, CA has a population of 13,361 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 91108? ▼
The median household income in ZIP 91108 is $204,847, which is 169% above the national average of $76,288.
What is the average home value in ZIP 91108? ▼
The median home value in ZIP 91108 is $2,000,000+, which is 619% above the national average of $278,155.
What is the demographic makeup of ZIP 91108? ▼
The largest racial group in ZIP 91108 is Asian at 67.5%. Hispanic or Latino residents make up 5.4% of the population.
How many businesses are in ZIP code 91108? ▼
ZIP code 91108 has 653 business establishments employing approximately 2,933 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 91108? ▼
The top industries by establishment count in ZIP 91108 are: Professional, scientific, and technical services (136), Health care and social assistance (91), Real estate and rental and leasing (89). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 91108? ▼
According to the FHFA House Price Index, home values in ZIP 91108 decreased by 9.8% in 2021. Since 2000, home values in this ZIP have appreciated by approximately 81%. 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 91108? ▼
In ZIP code 91108, 86.2% of residents aged 25+ have a high school diploma or higher, and 82.5% 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 91108? ▼
The mean commute time for workers in ZIP code 91108 is 26.5 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 91108? ▼
In ZIP code 91108, approximately 82.0% of occupied housing units are owner-occupied and 18.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 91108? ▼
The poverty rate in ZIP code 91108 is 6.6% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

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