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 High-density area
- $204,847
- Median income Above-median income area
- $2,000,000+
- Median home value Above-median home value
- 82.5%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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 average California ZIP), while per-capita income is $101,946. The poverty rate is 6.6%, with unemployment at 5.3%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $2,000,000+ (159% above the average California ZIP), while 82.0% of occupied homes are owner-occupied and median rent is $3,501.
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. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Los Angeles County, so 91108 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 91108
Top 5 sectors by establishment count in San Marino, CA
Which industries have the most business establishments in ZIP 91108.
- Professional, scientific, and technical services
Professional, scientific, and technical services
136 establishments
- Health care and social assistance
Health care and social assistance
91 establishments
- Real estate and rental and leasing
Real estate and rental and leasing
89 establishments
- Wholesale trade
Wholesale trade
59 establishments
- Finance and insurance 53
Finance and insurance
53 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 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
Who lives in ZIP 91108?
46.1
Median Age
50.3%
Male
49.7%
Female
46.5%
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?
$204,847
Median Household Income
+101% vs state ZIP avg
$101,946
Per Capita Income
6.6%
Poverty Rate
5.3%
Unemployment Rate
26.5 min
Mean Commute Time
How ZIP 91108 ranks among California ZIPs
San Marino, 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)
$204,847 Top 4% higher than 96% 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
4,567housing units
4,567
Total Housing Units
4,038
Occupied Units
529
Vacant Units
3.05
Avg Household Size
Occupancy Type
$2,000,000+
Median Home Value
+159% vs state ZIP avg
$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.
- 91801
Alhambra (91801)
52,735 residents
- 91776
San Gabriel (91776)
38,475 residents
- 91104
Pasadena (91104)
36,751 residents
- 91007
Arcadia (91007)
34,095 residents
- 91107
Pasadena (91107)
32,940 residents
- 91030
South Pasadena (91030)
25,616 residents
- 91106
Pasadena (91106)
24,229 residents
- 91775
San Gabriel (91775)
23,988 residents
- 91101 20,460
Pasadena (91101)
20,460 residents
What this shows Among its immediate neighbors, ZIP 91108 ranks #0 by population - useful context the national average alone can't give.
ZIP 91108 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 91108
San Marino (91108)
$204,847 median income
- 91105
Pasadena (91105)
$156,791 median income
- 91030
South Pasadena (91030)
$127,175 median income
- 91107
Pasadena (91107)
$126,449 median income
- 91775
San Gabriel (91775)
$118,610 median income
- 91104
Pasadena (91104)
$105,958 median income
- 91007
Arcadia (91007)
$100,705 median income
- 91106
Pasadena (91106)
$90,028 median income
- 91801
Alhambra (91801)
$89,156 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 91108, 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 (13,361 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Los Angeles County
Related Areas
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.
Related
Take this with you
What to do with ZIP 91108's numbers, next.
- See how ZIP 91108 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where San Marino, 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.