ZIP Code Tabulation Area · California

ZIP Code 91789: Walnut, CA

ZIP Code 91789 (Walnut, Los Angeles County, California) has an estimated 40,298 residents in 12,681 households. The median household income is $125,720, the median home value is $975,000 and the median gross rent is $2,865/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

40,298

Margin of error ±1,155

Median household income

$125,720

Margin of error ±$6,903

Median home value

$975,000

Margin of error ±$23,107

Median gross rent

$2,865/mo

Margin of error ±$124

Median age

46.3 yrs

Margin of error ±1.4 yrs

Mean travel time to work

33.5 min

Margin of error ±2.8 min

How ZIP 91789 compares with California and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 9178946.3 yrsCalifornia37.9 yrsUnited States38.9 yrs

Median household income

ZIP 91789$125,720California$99,122United States$80,734

Per capita income

ZIP 91789$49,392California$49,513United States$44,673

Poverty rate

ZIP 917899.2%California12.0%United States12.5%

Unemployment rate

ZIP 917894.4%California6.6%United States5.2%

Bachelor's degree or higher

ZIP 9178954.4%California37.1%United States35.7%

Median home value

ZIP 91789$975,000California$734,700United States$332,700

Median gross rent

ZIP 91789$2,865/moCalifornia$2,036/moUnited States$1,413/mo

Owner-occupied homes

ZIP 9178982.1%California55.9%United States65.2%

Mean travel time to work

ZIP 9178933.5 minCalifornia28.7 minUnited States26.4 min

Worked from home

ZIP 9178920.6%California17.2%United States15.1%

All figures for ZIP 91789

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 91789 — ACS 2020–2024 5-year estimates
MeasureZIP 91789Margin of errorCaliforniaUnited States
Total population40,298±1,15539,287,377334,922,499
Median age46.3 yrs±1.4 yrs37.9 yrs38.9 yrs
Households12,681±49313,548,091129,227,496
Median household income$125,720±$6,903$99,122$80,734
Per capita income$49,392±$2,554$49,513$44,673
Poverty rate9.2%±2.0 pts12.0%12.5%
Unemployment rate4.4%±0.9 pts6.6%5.2%
Bachelor's degree or higher54.4%±2.3 pts37.1%35.7%
Median home value$975,000±$23,107$734,700$332,700
Median gross rent$2,865/mo±$124$2,036/mo$1,413/mo
Owner-occupied homes82.1%±2.8 pts55.9%65.2%
Mean travel time to work33.5 min±2.8 min28.7 min26.4 min
Worked from home20.6%±2.3 pts17.2%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 91789
GroupZIP 91789CaliforniaUnited States
White alone, not Hispanic or Latino9.6%33.8%57.4%
Black or African American alone, not Hispanic or Latino1.7%5.2%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.2%0.3%0.5%
Asian alone, not Hispanic or Latino67.0%15.3%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.5%0.3%0.2%
Some other race alone, not Hispanic or Latino0.5%0.6%0.6%
Two or more races, not Hispanic or Latino2.4%4.4%4.3%
Hispanic or Latino (of any race)18.1%40.2%19.3%

Where ZIP 91789 is

State
California
Main county
Los Angeles County
Largest overlapping place
Walnut (56% of the ZIP's land area)
Land area
15.87 sq mi· about 2,539 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Los Angeles County

91740 Glendora, CA91741 Glendora, CA91744 La Puente, CA91745 Hacienda Heights, CA91746 Industry, CA91748 Rowland Heights, CA91750 La Verne, CA91754 Monterey Park, CA91755 Monterey Park, CA91759 Los Angeles County, CA91765 Diamond Bar, CA91766 Pomona, CA91767 Pomona, CA91768 Pomona, CA91770 Rosemead, CA91773 San Dimas, CA91775 East San Gabriel, CA91776 San Gabriel, CA91780 Temple City, CA91790 West Covina, CA91791 West Covina, CA91792 West Covina, CA91801 Alhambra, CA91803 Alhambra, CA

See every ZIP code in California, or compare ZIP 91789 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.