Walnut, CA · standard
ZIP Code 91789
Los Angeles County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 43,079
- 1,064/sq mi High-density area
- $125,720
- Median income Above-median income area
- $975,000
- Median home value Above-median home value
- 54.4%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Walnut pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 8%
- household income, US ZIPs
- Top 3%
- home value, US ZIPs
- 1,064
- people per sq mi
- 82%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 91789 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 91789 (Walnut, CA) rose +7.9% from 2023 to 2024. The all-transactions index moved from 342.9 in 2023 to 370.0 in 2024 (2000 = 100).
ZIP code 91789 is a densely settled ZIP (a standard USPS delivery area) in Walnut, Los Angeles County, California, with 43,079 residents across 40.5 square miles, a density of 1,064 people per square mile, in the Los Angeles time zone.
ZIP 91789 skews affluent, with a median household income of $125,720 (24% above the average California ZIP), while per-capita income is $49,392. The poverty rate is 9.2%, with unemployment at 4.4%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $975,000 (26% above the average California ZIP), while 82.1% of occupied homes are owner-occupied and median rent is $2,865.
This is a highly-educated ZIP: 54.4% of adults hold a bachelor's degree or higher, the median age is 46.3, and the average commute is 34 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Los Angeles County, so 91789 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 91789
Top 5 sectors by establishment count in Walnut, CA
Which industries have the most business establishments in ZIP 91789.
- Wholesale trade
Wholesale trade
513 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
292 establishments
- Transportation and warehousing
Transportation and warehousing
249 establishments
- Retail trade
Retail trade
230 establishments
- Health care and social assistance 173
Health care and social assistance
173 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 91789, Walnut, 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
43,079
Population
40.5
Area (sq mi)
1,064
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 91789?
46.3
Median Age
48.7%
Male
51.3%
Female
50.5%
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?
$125,720
Median Household Income
+24% vs state ZIP avg
$49,392
Per Capita Income
9.2%
Poverty Rate
4.4%
Unemployment Rate
33.5 min
Mean Commute Time
How ZIP 91789 ranks nationally
Walnut, CA household income vs. every US ZIP code
Median household income, the full national distribution, with this ZIP marked
$125,720 Top 8% higher than 92% of 30,318 US ZIPs
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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
13,503housing units
13,503
Total Housing Units
12,681
Occupied Units
822
Vacant Units
3.17
Avg Household Size
Occupancy Type
$975,000
Median Home Value
+26% vs state ZIP avg
$2,865
Median Rent
1982
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
+7.9%
YoY Change (2024)
370
HPI Index (2000 = 100)
+270%
Total Change Since 2000
Home values in ZIP 91789 have increased 7.9% over the past year (2024). Since 2000, this ZIP has seen +270% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | -0.1% | 257 |
| 2021 | +7.2% | 276 |
| 2022 | +17.5% | 324 |
| 2023 | +5.9% | 343 |
| 2024 | +7.9% | 370 |
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 2,325 business establishments in ZIP 91789, employing approximately 21,957 people with a combined annual payroll of $1,345,373,000.
2,325
Businesses
21,957
Employees
$1.3B
Annual Payroll
16
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Wholesale trade | 513 | 22.1% |
| Professional, scientific, and technical services | 292 | 12.6% |
| Transportation and warehousing | 249 | 10.7% |
| Retail trade | 230 | 9.9% |
| Health care and social assistance | 173 | 7.4% |
| Real estate and rental and leasing | 152 | 6.5% |
| Other services (except public administration) | 131 | 5.6% |
| Accommodation and food services | 127 | 5.5% |
| Construction | 111 | 4.8% |
| Finance and insurance | 77 | 3.3% |
| Administrative and support and waste management and remediation services | 67 | 2.9% |
| Manufacturing | 64 | 2.8% |
| Educational services | 58 | 2.5% |
| Information | 41 | 1.8% |
| Arts, entertainment, and recreation | 28 | 1.2% |
| Management of companies and enterprises | 8 | 0.3% |
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 91789 vs 91792 →
ZIP 91789 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 91744
La Puente (91744)
85,040 residents
- 91766
Pomona (91766)
71,599 residents
- 91765
Diamond Bar (91765)
46,457 residents
- 91748
Rowland Heights (91748)
45,406 residents
- 91789
Walnut (91789)
43,079 residents
- 91768
Pomona (91768)
34,537 residents
- 91791 32,414
West Covina (91791)
32,414 residents
- 91792 30,854
West Covina (91792)
30,854 residents
- 91724 26,184
Covina (91724)
26,184 residents
What this shows Among its immediate neighbors, ZIP 91789 ranks #5 by population - useful context the national average alone can't give.
ZIP 91789 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 91789
Walnut (91789)
$125,720 median income
- 91765
Diamond Bar (91765)
$105,565 median income
- 91724
Covina (91724)
$103,163 median income
- 91791
West Covina (91791)
$102,266 median income
- 91740
Glendora (91740)
$99,083 median income
- 91792
West Covina (91792)
$94,817 median income
- 91723
Covina (91723)
$94,167 median income
- 91744
La Puente (91744)
$93,557 median income
- 91748
Rowland Heights (91748)
$83,428 median income
What this shows By household income, ZIP 91789 ranks the highest of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 91792 | West Covina, CA | 30,854 | 2.6 mi |
| 91724 | Covina, CA | 26,184 | 4.3 mi |
| 91765 | Diamond Bar, CA | 46,457 | 3.1 mi |
| 91791 | West Covina, CA | 32,414 | 3.7 mi |
| 91748 | Rowland Heights, CA | 45,406 | 3.9 mi |
| 91744 | La Puente, CA | 85,040 | 4.8 mi |
| 91723 | Covina, CA | 18,275 | 4.9 mi |
| 91740 | Glendora, CA | 25,356 | 6.9 mi |
| 91768 | Pomona, CA | 34,537 | 4.8 mi |
| 91766 | Pomona, CA | 71,599 | 5.8 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 91789, 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 (43,079 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 91789 in?
ZIP code 91789 (Walnut) 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 91789?
ZIP code 91789 in Walnut, CA has a population of 43,079 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 91789?
The median household income in ZIP 91789 is $125,720, which is 65% above the national average of $76,288.
What is the average home value in ZIP 91789?
The median home value in ZIP 91789 is $975,000, which is 251% above the national average of $278,155.
What is the demographic makeup of ZIP 91789?
The largest racial group in ZIP 91789 is Asian at 67.8%. Hispanic or Latino residents make up 18.1% of the population.
How many businesses are in ZIP code 91789?
ZIP code 91789 has 2,325 business establishments employing approximately 21,957 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 91789?
The top industries by establishment count in ZIP 91789 are: Wholesale trade (513), Professional, scientific, and technical services (292), Transportation and warehousing (249). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 91789?
According to the FHFA House Price Index, home values in ZIP 91789 increased by 7.9% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 270%. 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 91789?
In ZIP code 91789, 69.4% of residents aged 25+ have a high school diploma or higher, and 54.4% 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 91789?
The mean commute time for workers in ZIP code 91789 is 33.5 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 91789?
In ZIP code 91789, approximately 82.1% of occupied housing units are owner-occupied and 17.9% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 91789?
The poverty rate in ZIP code 91789 is 9.2% 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 91789's numbers, next.
- See how ZIP 91789 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Walnut, CA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.