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Population & Demographics

ZIP Code 91001 has 36,578 residents and 12,928 households (average 2.78 persons per household). The median age is 45.3 years, significantly older than the state (37.5) and older than the nation (38.8). The gender split is 48.3% male and 51.7% female, which is slightly lower than the state male share (49.4%), making this a female-majority area. Largest groups are White (42.6%, much lower than the national average of 61.6%) and Hispanic or Latino (30.3%); Hispanic or Latino residents make up 30.3%, which is much higher than the national average (18.7%), and Black or African American share is much higher than the state average (5.7%).

Explore More:Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship

Source: U.S. Census 2020 Demographics & Housing Characteristics (DHC) and U.S. Census 2011-2023 American Community Survey (ACS) 5-Year Estimates.

2020 Population:	36,578Source: Census DHC
2023 ACS Population Estimate:	36,402Source: Census ACS
2025 ZC Population Estimate:	18,853Source: ZIP-Codes.com
Population Density:	4,428.3 people per sq mile
Average Income:	$133,840Source: Census ACS

Households:	12,928Source: Census DHC
Average House Value:	$1,085,000Source: Census ACS
Persons Per Household:	2.78Source: Census DHC
Average Family Size:	3.17Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)

Line chart of ZIP 91001 population estimates from 2011-2023, with markers for the 2010 and 2020 Decennial Census counts to show growth or decline over time. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2010	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Census ACS Population Estimate	--	38,113	38,066	37,832	37,481	37,163	37,699	37,528	37,711	37,818	36,697	36,867	36,420	36,402
Decennial Census	36,126	--	--	--	--	--	--	--	--	--	36,578	--	--	--

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

Population by Age & Gender (Total, Male, Female)

Median Age: 45.3

Male Median Age: 43.6

Female Median Age: 46.9

Line chart for ZIP 91001 showing total, male, and female population by age group. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	< 5	5-9	10-14	15-19	20-24	25-29	30-34	35-39	40-44	45-49	50-54	55-59	60-64	65-69	70-74	75-79	80-84	85+
Male	787	1,024	1,124	1,137	942	873	948	1,161	1,171	1,191	1,332	1,414	1,348	1,122	857	558	325	357
Female	789	905	1,029	969	884	885	1,063	1,240	1,208	1,294	1,467	1,535	1,472	1,250	1,046	741	539	591
Total	1,576	1,929	2,153	2,106	1,826	1,758	2,011	2,401	2,379	2,485	2,799	2,949	2,820	2,372	1,903	1,299	864	948

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Pie Chart & Table Comparison Chart

Population by Race

Pie chart of the racial and ethnic makeup of ZIP 91001. Table below includes counts and percentages. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

White:	15,570	37.33%
Black:	7,128	17.09%
Hispanic:*	11,066	26.53%
Asian:	2,433	5.83%
American Indian:	328	0.79%
Hawaiian:	32	0.08%
Other:	5,152	12.35%
Total:	41,709	100%

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

* NOTE: Hispanic or Latino is an ethnicity, not a race. This means individuals who identify as Hispanic will also be included in one of the race categories (such as White or Black). As a result, the totals shown here may exceed 100% when Hispanic is displayed alongside racial groups.

Pie Chart & Table Comparison Chart

Gender Breakdown

Simple chart showing male vs female share of the population in ZIP Code 91001. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Gender	Count	%	Median Age
Males:	17,671	48.31%	43.6 years
Females:	18,907	51.69%	46.9 years
Total:	36,578	100%	45.3 years

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship

Pie chart showing nativity in ZIP 91001. Categories include native residents (born in the United States, Puerto Rico, U.S. Island Areas, or abroad to American parents) and foreign-born residents. A table below lists counts and percentages. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Native, born in the United States:	29,172	80.14%
Native, born in PR, Island Areas, or abroad:	399	1.10%
Foreign born, naturalized U.S. citizen:	5,019	13.79%
Foreign born, not a U.S. citizen:	1,812	18.77%
Total Population:	36,402	100%
Total Native Population:	29,571	81.23%
Total Foreign-born Population:	6,831	18.77%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Note: Nativity and Citizenship derived from American Community Survey (ACS) 5-year estimates. Total Population listed here will not match official ZIP Code population totals, which are based on the Decennial Census.

Income & Employment

In 2023, the Median household income is $133,840, which is markedly greater than the national median ($78,538), is up $47,483 (55.0%) since 2011 and above its 2019 pre-pandemic level by $32,779. Family households earn a median of $158,780 versus $90,857 for nonfamily households (a difference of $67,923). By gender, male median income is $85,688 and female is $86,577, which is considerably higher than the national female median ($53,445), with a current gap of $889 that has narrowed from 2011 to 2023. The labor-force participation rate is 64.4%, which is about the same as the national rate (63.5%). The unemployment rate is 8.1%, which is much higher than the national rate (5.2%). The largest occupation group is Management (57.1%).

Explore More:Income Over Time Household Income Employment Status By Occupation

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02, DP03, DP04 and DP05.

Median Income Over Time (Household, Family, Nonfamily, Male, Female)

Line chart showing median income in ZIP 91001 from 2011-2023 for five series: household, family, nonfamily, male, and female. The table below lists the yearly values. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Income Type	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Household Income	$86,357	$85,448	$85,108	$85,655	$86,310	$89,906	$91,090	$98,289	$101,061	$104,577	$114,668	$129,030	$133,840
Median Family Income	$91,376	$90,621	$92,295	$96,406	$97,221	$98,739	$98,936	$106,654	$109,270	$118,461	$131,461	$142,488	$158,780
Median NonFamily Income	$62,686	$62,450	$60,531	$53,832	$52,763	$52,649	$55,811	$55,262	$61,595	$65,101	$75,089	$89,837	$90,857
Median Male Income	$64,488	$65,977	$65,852	$70,577	$70,056	$70,042	$66,229	$69,664	$71,471	$71,231	$74,881	$85,388	$85,688
Median Female Income	$52,448	$51,766	$52,260	$53,431	$53,065	$56,210	$59,989	$56,806	$58,597	$62,022	$68,958	$81,172	$86,577

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Average Household Income

Bar chart showing average household income comparing ZIP 91001, city of Altadena, Los Angeles County, state of California, and United States national values. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Pie Chart & Table Comparison Chart

Employment Status

Pie chart of employment status for ZIP 91001, showing the shares who are employed, unemployed, and not in the labor force. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Employed:	17,751	59.05%
Unemployed:	1,567	5.21%
Not In Labor Force:	10,745	35.74%
Total:	30,063	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Employment by Occupation (Civilian Employed Population, 16 and Over)

Donut Chart showing the distribution of employed civilians aged 16 and over by occupation category: management, service, sales and office, natural resources and construction, and production and transportation. A table with the same data and percentages is provided as well.Load Chart Manually (if needed)

Management, business, science, and arts:	10,131	57.07%
Service:	2,994	16.87%
Sales and Office:	2,508	14.13%
Natural resources, construction, and maintenance:	956	5.39%
Production, transportation, and material moving:	1,162	6.55%
Total Civilian Employed Population:	17,751	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS.

Housing & Affordability

In 2023, the median home value is $1,085,000, which is far above the national median ($303,400), is up $475,600 (78.04%) since 2011 and above its 2019 pre-pandemic level by $336,900. The median gross rent is $2,298, which is far above the national median ($1,348), is up $986 (75.15%) since 2011 and above its 2019 pre-pandemic level by $570. Of occupied housing, owners make up 80.54% (74.29% with a mortgage, 25.71% free-and-clear) and renters 19.46% - making this ZIP Code more home ownership than the state and under national rental averages. The vacancy rate is 4.58%, which is markedly below the national rate (10.43%).

Explore More:Compare Home Value Home Value Over Time Rent & Over Time Housing Occupancy

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Table DP03, SELECTED ECONOMIC CHARACTERISTICS.

Median Home Value (Comparison)

Bar chart showing the median home value for ZIP 91001, compared with Altadena, Los Angeles County, state of California, and the U.S. National Average. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Home Value Over Time

Line chart showing median home values for ZIP 91001 across years 2011-2023 using ACS 5-year estimates. The chart displays the typical dollar value of owner-occupied housing units. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Home Value	$609,400	$578,600	$550,000	$562,100	$586,500	$615,800	$649,700	$693,900	$748,100	$812,400	$887,100	$1,002,600	$1,085,000

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid

Pie chart of gross rent for renter-occupied homes in ZIP 91001, showing monthly rent brackets and the share of units in each range. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Less than $500:	7	0.28%
$500 to $999:	147	5.94%
$1,000 to $1,499:	203	8.20%
$1,500 to $1,999:	468	18.90%
$2,000 to $2,499:	456	18.42%
$2,500 to $2,999:	280	11.31%
$3,000 or more:	633	25.57%
No Rent:	282	11.39%
Total:	2,476	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Gross Rent Over Time

Line chart displaying median gross rent for ZIP 91001 over the years 2011-2023 using ACS 5-year estimates. The chart represents typical monthly housing costs for renter households. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Rent	$1,312	$1,399	$1,445	$1,439	$1,445	$1,500	$1,617	$1,639	$1,728	$1,808	$1,824	$2,160	$2,298

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy

Pie chart showing housing occupancy for ZIP 91001. Categories include owner-occupied units with a mortgage, owner-occupied units free and clear, and renter-occupied units. A table below lists counts and percentages. Vacant housing units are shown separately in the Vacancy chart. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Owner Occupied (with mortgage):	7,613	59.83%
Owner Occupied (free and clear, no mortgage):	2,635	20.71%
Renter Occupied:	2,476	19.46%
Total Occupied Housing Units:	12,724	100%

Occupied Housing Units:	12,724	95.42%
Vacant Housing Units (not graphed):	611	4.58%
Total Housing Units:	13,335	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Housing Type (Single-Family, Multi-Family, Other)

Pie chart showing housing type distribution for ZIP 91001. Categories include single-family units (detached or attached), multi-family units (from 2 units up to 50 or more units), and other structures such as mobile homes or boats/RVs. A table below lists counts and percentages for each group.Load Chart Manually (if needed)

Single-Family Units:	12,432	93.23%
Multi-Family Units:	903	6.77%
Other Units:	0	0.00%
Total Housing Units:	13,335	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Education, Health & Community

In 2023, 52.10% of adults (25+) have a bachelor's degree or higher, which is far higher than the national rate (35.00%), well above both the state and national averages. High school or higher is 92.70%, which is markedly above the state rate (84.60%). The uninsured rate is 3.40%, which is far lower than the national rate (8.60%). The share of people in poverty is 5.00%, which is falls below the national rate (8.70%), down 1.30 percentage points since 2011 and above its 2019 pre-pandemic level by 0.20 percentage points. This suggests a positive shift in the local economic and social landscape - higher incomes, steadier consumer demand, and a strengthening tax base. Among residents ages 3+, the largest enrollment group is elementary (40.34%). College enrollment is 26.94%, which is on par with the state rate (30.00%), meaning the community mirrors broader higher-education participation.

Explore More:Educational Attainment Health Insurance Poverty Over Time School Enrollment

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02 and DP03.

Educational Attainment of Adults (25 and Older)

Pie chart of educational attainment for adults (25+) in ZIP 91001, including each level from less than 9th grade to graduate/professional. Summary rows show high school or higher and bachelor's or higher. A table lists counts and percentages.Load Chart Manually (if needed)

Less than 9th grade:	1,229	4.50%
9th to 12th grade, no diploma:	761	2.78%
High school graduate (includes equivalency):	3,917	14.33%
Some college, no degree:	4,739	17.33%
Associate's degree:	2,451	8.96%
Bachelor's degree:	7,343	26.86%
Graduate or professional degree:	6,901	25.24%
Total:	27,341	100%
High school or higher:	25,351	92.72%
Bachelor's degree or higher:	14,244	52.10%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Pie Chart & Table Comparison Chart

Health Insurance Coverage by Type (Private, Public, Uninsured)

Pie chart illustrating health insurance coverage by type for ZIP Code 91001. Categories include private insurance, public coverage such as Medicare and Medicaid, and individuals with no health insurance. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Private Insurance:	25,997	64.26%
Public Insurance:	13,241	32.73%
No Insurance:	1,220	3.02%
Total:	40,458	100%
Has Health Insurance:	39,238	96.98%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Percentage of People in Poverty Over Time (2011-2023)

Line chart displaying the share of families and people in ZIP 91001 whose income falls below the federal poverty threshold, using ACS 5-year estimates from 2011 through 2023. The chart shows year-to-year changes in the percentage of people in poverty. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
% of People in Poverty	6.3%	6.5%	7.4%	7.4%	6.7%	7.0%	7.0%	5.1%	4.8%	4.8%	3.8%	4.7%	5.0%

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.

School Enrollment by Education Level (Ages 3 and Older)

Pie Chart showing enrollment of residents ages 3 and older in Nursery School or Preschool, Kindergarten, Elementary (grades 1-8), High School (grades 9-12), and College or Graduate School. A table with the same data and percentages is provided as well.Load Chart Manually (if needed)

Nursery School, Preschool:	613	7.83%
Kindergarten:	396	5.06%
Elementary school (grades 1-8):	3,160	40.34%
High school (grades 9-12):	1,554	19.84%
College or graduate school:	2,110	26.94%
Total:	7,833	100%
Early Childhood:	1,009	12.88%
K-12 (Primary & Secondary School):	5,110	65.24%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

City:	Altadena, California
County:	Los Angeles County
Timezone:	Pacific (GMT -08:00)
Local Time:	8:11:59 PM
Population:	36,578 [See All]
Area Codes:	323 / 626 / 738
Classification:	Standard [Normal Street Delivery]
Coordinates:	34.1963, -118.1356
Land Area:	8.26 sq mi
Quick Link:	https://www.zip-codes.com/zip-code/91001/zip-code-91001.asp

# Residential Mailboxes:	6,782Source: USPS
# Business Mailboxes:	278Source: USPS
Total Delivery Receptacles:	7,046Source: USPS
Single Family Delivery Units:	6,210Source: USPS
Multi Family Delivery Units:	537Source: USPS

# of Businesses:	752Source: CBP
1st Quarter Payroll:	$68,791,000Source: CBP
Annual Payroll:	$282,507,000Source: CBP
# of Employees:	4,913Source: CBP

CBSA Name:	Los Angeles-Long Beach-Anaheim, CASource: Census
CBSA Number:	31080Source: Census
CBSA Type:	MetroSource: Census
CBSA Division:	Los Angeles-Long Beach-Glendale, CA (CBSA Div 31084)Source: Census
CBSA Population:	13,012,469Source: Census
MSA:	Los Angeles-Riverside-Orange County, CASource: Census
Land Area:	8.26 sq miSource: Census
Water Area:	0.035 sq miSource: Census

Congressional District:	28,30Source: USPS
Congressional Land Area:	218.45, 135.94 sq miSource: Census
PMSA:	Los Angeles-Long Beach, CA PMSASource: Census
Intro Date:	< 2004-10Source: ZIP-Codes.com
Place FIPS Code:	0601290Source: Census
Place Name:	Altadena CDP; CaliforniaSource: Census

ZIP Code 91001 in Altadena, CA

Population & Demographics

Population Over Time (with 2010 & 2020 Census Benchmarks)

Population by Age & Gender (Total, Male, Female)

Population by Race

Gender Breakdown

Nativity & Citizenship

Income & Employment

Median Income Over Time (Household, Family, Nonfamily, Male, Female)

Average Household Income

Employment Status

Employment by Occupation (Civilian Employed Population, 16 and Over)

Housing & Affordability

Median Home Value (Comparison)

Median Home Value Over Time

Gross Rent Paid

Median Gross Rent Over Time

Housing Occupancy

Housing Type (Single-Family, Multi-Family, Other)

Education, Health & Community

Educational Attainment of Adults (25 and Older)

Health Insurance Coverage by Type (Private, Public, Uninsured)

Percentage of People in Poverty Over Time (2011-2023)

School Enrollment by Education Level (Ages 3 and Older)

Business & Employment Statistics

Geography, Land Area, & Statistical Classifications

Adjacent & Nearby ZIP Codes

Schools in ZIP Code 91001

Colleges & Post Secondary Schools near ZIP Code 91001

Sources & References