Lower Arroyo Seco, Pasadena, CA demographics:
population, income, and more

Total population
6,008
-0.1% year-over-year change
Median household income
$156,791/yr
-0.0% year-over-year change
Housing units
3,223
-0.7% year-over-year change

Lower Arroyo Seco population

How many people live in Lower Arroyo Seco

Lower Arroyo Seco is home to 6,008 residents, according to the most recent Census data. Gender-wise, 47.5% of Lower Arroyo Seco locals are male, and 52.5% are female.

Total population
6,008
-0.1% year-over-year change
Gender ratio
Male
47.5%
2,856
Female
52.5%
3,152
Value Percent YoY change
Male 2,856 47.5% -1.6%
Female 3,152 52.5% 1.3%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Lower Arroyo Seco is 48, with the population distributed as follows: about 10.7% are children under 15, then 7.2% are in the 15 to 24 age group. Adults between 25 and 44 make up 27.8% of the population, while another 26.7% fall into the 45 to 64 bracket. Finally, around 27.6% are 65 or older.

Median age
47.6
Age breakdown
Under 15
10.7%
15 to 24
7.2%
25 to 44
27.8%
45 to 64
26.7%
Over 65
27.6%
Value Percent YoY change
Under 15 643 10.7% -6.5%
15 to 24 431 7.2% 0.7%
25 to 44 1,673 27.8% -1.7%
45 to 64 1,604 26.7% 0.6%
Over 65 1,657 27.6% 3.5%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Lower Arroyo Seco, 76.2% of the population are US-born citizens, while 17.1% have gained naturalized citizenship. At the same time, 6.6% of residents are non-citizens. As for race, 54.1% of locals are Caucasian, 2.9% are African American and 21.9% have Asian roots. Another 0.2% are Indigenous American, 0.1% are Pacific Islanders, while 6% identify as another race. There’s also a share of 14.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
76.2%
Non-U.S.-born citizens
17.1%
Non-citizens
6.6%
Value Percent YoY change
U.S.-born citizens 4,580 76.2% 0.0%
Non-U.S.-born citizens 1,028 17.1% 3.6%
Non-citizens 399 6.6% -10.3%
Racial breakdown
White
54.1%
Black or African American
2.9%
American Indian and Alaska Native
0.2%
Asian
21.9%
Native Hawaiian and other Pacific Islander
0.1%
Two or more races
14.8%
Other
6%
Value Percent
White 3,252 54.1%
Black or African American 173 2.9%
American Indian and Alaska Native 10 0.2%
Asian 1,316 21.9%
Native Hawaiian and other Pacific Islander 6 0.1%
Two or more races 890 14.8%
Other 362 6%

Households in Lower Arroyo Seco

A peek inside Lower Arroyo Seco households

Lower Arroyo Seco has 2,753 households, with an average of 2 members in each. Of these, 55.4% are families, while the remaining 44.7% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
2,753
-0.5% year-over-year change
Average people per household
2
Non-family households
1,230
Family households
1,524
Value Percent YoY change
Non-family households 1,230 44.7% -6.4%
Family households 1,524 55.4% 4.9%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Lower Arroyo Seco

The housing landscape of Lower Arroyo Seco

Lower Arroyo Seco's housing consists of 3,223 units, with 48% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 4.9% and offer a more compact, shared living style.

Housing units
3,223
-0.7% year-over-year change
Housing types
Value Percent
1 unit, detached 1,545 48%
1 unit, attached 159 4.9%
2 units 28 0.9%
3 or 4 units 97 3%
5 to 9 units 214 6.6%
10 to 19 units 216 6.7%
20 to 49 units 438 13.6%
50 or more units 525 16.3%
Homes built since 2020
13
% year-over-year change

The age of buildings in Lower Arroyo Seco

In Lower Arroyo Seco, the median construction year is 1961. About 26% of homes were built before the 1940s, with another 8% going up by 1949. Most development happened in the second half of the 20th century. Then, 7.9% of homes were added from 2000 to 2009, 8.4% between 2010 and 2019, and 0.4% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 839 26% -6.8%
Built between 1940 and 1949 258 8% -6.9%
Built between 1950 and 1959 479 14.9% -11.3%
Built between 1960 and 1969 391 12.1% 3.7%
Built between 1970 and 1979 393 12.2% 8.0%
Built between 1980 and 1989 187 5.8% 33.6%
Built between 1990 and 1999 138 4.3% 14.1%
Built between 2000 and 2009 254 7.9% -4.5%
Built between 2010 and 2019 270 8.4% 2.7%
Built in 2020 or later 13 0.4% N/A
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Lower Arroyo Seco occupancy rates

Out of the 2,753 occupied housing units in Lower Arroyo Seco, 55.7% are owner-occupied, while 44.4% are lived in by tenants. Meanwhile, 14.6% of all homes on the local market sit vacant.

Occupied housing units
2,753
-0.5% year-over-year change
Occupancy breakdown
Renter occupied
1,221
Owner occupied
1,533
Value Percent YoY
change
Renter occupied 1,221 44.4% -5.6%
Owner occupied 1,533 55.7% 4.1%
Unoccupied housing units
14.6%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Lower Arroyo Seco housing costs

Housing costs in Lower Arroyo Seco come to a median of $3,175 per month, while tenants specifically pay a median gross rent of $3,075.

Median housing costs per month
$3,175/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Lower Arroyo Seco
$3,075/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Lower Arroyo Seco

Lower Arroyo Seco education at a glance

About 9% of the population in Lower Arroyo Seco went to high school, while 12.8% pursued college studies. Another 5% earned an associate degree and 35.8% hold a bachelor’s. Meanwhile, 36.4% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 47 0.9% -16.1%
High school diploma 466 9% -5.1%
College diploma 658 12.8% -4.6%
Associate degree 258 5% -13.1%
Bachelor's degree 1,849 35.8% 1.7%
Graduate degree 1,879 36.4% 1.1%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Lower Arroyo Seco

How much people earn in Lower Arroyo Seco

The average annual household income in Lower Arroyo Seco was $239,691 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4.9% change from the previous year. At the same time, the median income stood at $156,791, reflecting a -0% shift over the same period.

Average household income in Lower Arroyo Seco
$239,691/year
4.9% year-over-year change
Median household income in Lower Arroyo Seco
$156,791/year
-0.0% year-over-year change

Lower Arroyo Seco income by age

In Lower Arroyo Seco, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $156,671. Those with someone between 45 and 64 in charge, often well established professionally, earn $203,143 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $8,719, while those led by someone over 65, many of whom may be retired, have about $132,614 in earnings. Overall, 93.1% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $8,719 N/A
25 - 44 $156,671 -0.7%
45 - 64 $203,143 4.6%
Over 65 $132,614 -7.7%
Above poverty level
5,421
Below poverty level
399
Value Percent YoY
change
Above poverty level 5,421 93.1% 0.6%
Below poverty level 399 6.9% -10.5%

Employment in Lower Arroyo Seco

Workforce and job types in Lower Arroyo Seco

97.8% of the working population are employed in professional or administrative positions, while 2.2% are in hands-on or service-based jobs. Also, 20.1% run their own businesses, 56.1% are employed by private companies, and 12.7% work in the public sector.

Workforce demographics

White collar
3,152
Blue collar
70
Value Percent YoY change
White collar 3,152 97.8% 1.6%
Blue collar 70 2.2% 4.5%
Employer type
Self employees
20.1%
Private companies
56.1%
Governmental workers
12.7%
Not for profit companies
11.1%
Value Percent YoY change
Self employees 649 20.1% -2.4%
Private companies 1,807 56.1% 8.3%
Governmental workers 409 12.7% 1.5%
Not for profit companies 357 11.1% -17.4%

Transportation in Lower Arroyo Seco

How people get around in Lower Arroyo Seco

Commuting methods vary: 90.6% of residents travel by personal vehicle and 4.5% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 1,660 90.6% -1.5%
Taxicab 20 1.1% 42.9%
Bus or trolleybus 18 1% -30.8%
Motorcycle 30 1.6% -14.3%
Bicycle 22 1.2% -63.3%
Walk 82 4.5% -16.3%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Lower Arroyo Seco by zipcode?

Zipcode Population Number of households Median income Average income
91105 12,531 5,743 $156,791 $242,148

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FAQs about Lower Arroyo Seco demographics 

What is the total population of Lower Arroyo Seco?

Lower Arroyo Seco has a total population of 6,008 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.1% compared to a year ago.

What is the gender ratio in Lower Arroyo Seco?

The gender ratio in Lower Arroyo Seco is as follows:
  • 47.5% males (2,856 residents)
  • 52.5% females (3,152 residents)

What is the median age in Lower Arroyo Seco?

The median age in Lower Arroyo Seco is 47.6.

What is the age distribution of the population in Lower Arroyo Seco?

The age distribution in Lower Arroyo Seco is as follows:
  • Under 15: 10.7% (643 residents)
  • Ages 15-24: 7.2% (431 residents)
  • Ages 25-44: 27.8% (1,673 residents)
  • Ages 45-64: 26.7% (1,604 residents)
  • Over 65: 27.6% (1,657 residents)

What is the racial and ethnic makeup of Lower Arroyo Seco?

The racial and ethnic makeup of Lower Arroyo Seco is as follows:
  • White: 54.1% (3,252 residents)
  • Black or African American: 2.9% (173 residents)
  • American Indian and Alaska Native: 0.2% (10 residents)
  • Asian: 21.9% (1,316 residents)
  • Native Hawaiian and Other Pacific Islander: 0.1% (6 residents)
  • Two or More Races: 14.8% (890 residents)
  • Other: 6% (362 residents)

What percentage of the population in Lower Arroyo Seco are U.S.-born citizens?

U.S.-born citizens represent 76.2% of the population in Lower Arroyo Seco.

How many housing units are there in Lower Arroyo Seco?

There are 3,223 housing units in Lower Arroyo Seco, reflecting a -0.7% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Lower Arroyo Seco and what is the average household size?

Lower Arroyo Seco has a total of 2,753 households, with an average of 2 people in each.

What is the median household income in Lower Arroyo Seco?

Lower Arroyo Seco has a median household income of $156,791, representing a -0.0% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Lower Arroyo Seco?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 97.8% (3,152 residents)
  • Blue-collar workers: 2.2% (70 residents)

Places of employment:
  • Self-employed: 20.1% (649 residents)
  • Private companies: 56.1% (1,807 residents)
  • Governmental workers: 12.7% (409 residents)
  • Not-for-profit companies: 11.1% (357 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025