PlainZIP

Altadena, CA · standard

ZIP Code 91001

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

36,126
1,690/sq mi
$134,903
Median income
$1,135,200
Median home value
53.9%
Bachelor's or higher

The verdict

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

Top 6%
household income, US ZIPs
Top 2%
home value, US ZIPs
1,690
people per sq mi
80%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 91001 against every reporting US ZIP.

ZIP code 91001 is a densely settled ZIP (a standard USPS delivery area) in Altadena, Los Angeles County, California, with 36,126 residents across 21.4 square miles, a density of 1,690 people per square mile, in the Los Angeles time zone.

ZIP 91001 skews affluent, with a median household income of $134,903 (33% above the California average), while per-capita income is $68,163. Poverty here runs at 7.4%, with unemployment measured at 7.3%. The typical home here is valued at $1,135,200 (47% above the state average); renters pay a median of $2,437 monthly, and 79.9% of units are owner-occupied.

This is a highly-educated ZIP: 53.9% of adults hold a bachelor's degree or higher, the median age is 46.3, and the average commute is 28 minutes. To put 91001 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 91001

Top 5 sectors by establishment count in Altadena, CA

Which industries have the most business establishments in ZIP 91001.

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 91001, Altadena, 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

36,126

Population

21.4

Area (sq mi)

1,690

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 91001?

46.3

Median Age

48.6%

Male

51.4%

Female

20.0%

Foreign-Born

White 39.0%
African American 20.3%
Asian 6.5%
American Indian or Alaska Native 0.7%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 18.4%
Hispanic or Latino 28.6%

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?

$134,903

Median Household Income

+33% vs state

$68,163

Per Capita Income

7.4%

Poverty Rate

7.3%

Unemployment Rate

28.0 min

Mean Commute Time

How ZIP 91001 ranks nationally

Altadena, CA household income vs. every US ZIP code

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

$134,903 Top 6% higher than 94% 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%). This entry sits in this band. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. 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 67.8%
Bachelor's Degree or Higher 53.9%

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

What does housing look like?

13,216

Total Housing Units

12,587

Occupied Units

629

Vacant Units

2.76

Avg Household Size

Occupancy Type

Owner 79.9%
Renter 20.1%

$1,135,200

Median Home Value

+47% vs state

$2,437

Median Rent

1946

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

+9.1%

YoY Change (2024)

471

HPI Index (2000 = 100)

+371%

Total Change Since 2000

Home values in ZIP 91001 have increased 9.1% over the past year (2024). Since 2000, this ZIP has seen +371% cumulative appreciation.

Year Annual Change HPI Index
2020 +2.5% 319
2021 +9.5% 350
2022 +16.7% 408
2023 +5.7% 431
2024 +9.1% 471

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 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 752 business establishments in ZIP 91001, employing approximately 4,913 people with a combined annual payroll of $282,507,000.

752

Businesses

4,913

Employees

$282.5M

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 146 19.4%
Health care and social assistance 112 14.9%
Arts, entertainment, and recreation 86 11.4%
Construction 52 6.9%
Information 51 6.8%
Retail trade 49 6.5%
Other services (except public administration) 48 6.4%
Accommodation and food services 41 5.5%
Administrative and support and waste management and remediation services 34 4.5%
Real estate and rental and leasing 32 4.3%
Educational services 32 4.3%
Finance and insurance 23 3.1%
Wholesale trade 20 2.7%
Manufacturing 9 1.2%
Transportation and warehousing 8 1.1%
Utilities 3 0.4%

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 91001 vs 91104 →

ZIP 91001 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 91001 ranks #2 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 91001 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 91001 ranks #5 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
91104 Pasadena, CA 36,751 2.1 mi
91101 Pasadena, CA 20,460 3.4 mi
91103 Pasadena, CA 27,480 2.4 mi
91106 Pasadena, CA 24,229 4.0 mi
91105 Pasadena, CA 11,254 4.3 mi
91107 Pasadena, CA 32,940 3.9 mi
91011 La Canada Flintridge, CA 20,280 4.2 mi
91108 San Marino, CA 13,361 5.2 mi
91208 Glendale, CA 16,245 5.6 mi
91030 South Pasadena, CA 25,616 6.0 mi

More ZIP Codes in Los Angeles County

90650 standard
Norwalk, CA
Pop: 105,549
90011 standard
Los Angeles, CA
Pop: 103,892
91331 standard
Pacoima, CA
Pop: 103,689
90201 standard
Bell Gardens, CA
Pop: 101,279
90280 standard
South Gate, CA
Pop: 94,396
90805 standard
Long Beach, CA
Pop: 93,524

Related Areas

Los Angeles County Altadena, CA California

Frequently Asked Questions

What county is ZIP code 91001 in? ▼
ZIP code 91001 (Altadena) 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 91001? ▼
ZIP code 91001 in Altadena, CA has a population of 36,126 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 91001? ▼
The median household income in ZIP 91001 is $134,903, which is 77% above the national average of $76,288.
What is the average home value in ZIP 91001? ▼
The median home value in ZIP 91001 is $1,135,200, which is 308% above the national average of $278,155.
What is the demographic makeup of ZIP 91001? ▼
The largest racial group in ZIP 91001 is White at 39.0%. Hispanic or Latino residents make up 28.6% of the population.
How many businesses are in ZIP code 91001? ▼
ZIP code 91001 has 752 business establishments employing approximately 4,913 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 91001? ▼
The top industries by establishment count in ZIP 91001 are: Professional, scientific, and technical services (146), Health care and social assistance (112), Arts, entertainment, and recreation (86). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 91001? ▼
According to the FHFA House Price Index, home values in ZIP 91001 increased by 9.1% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 371%. 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 91001? ▼
In ZIP code 91001, 67.8% of residents aged 25+ have a high school diploma or higher, and 53.9% 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 91001? ▼
The mean commute time for workers in ZIP code 91001 is 28.0 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 91001? ▼
In ZIP code 91001, approximately 79.9% of occupied housing units are owner-occupied and 20.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 91001? ▼
The poverty rate in ZIP code 91001 is 7.4% 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.