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ZIP Code · CA

ZIP 91789

Part of Walnut, CA
Pop. 40,298·Los Angeles County·196th most expensive ZIP in California
Median rent (all units)
$3,455/mo
Year-over-Year
+1.6%
Month-over-Month
-5.1%
vs US Median
+$1,490
Falling (Monthly)
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Most AffordableMost Expensive
ZIP 91789 · $3,455
More expensive than 95% of US ZIP codes · National median $1,965/mo
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Medians by bedroom

Rent by unit size

Studio
$2,780
1 BR
$3,110
2 BR
$3,880
3 BR
$4,920
4 BR+
$5,480
Research median
$3,880/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: July 20, 2026

Annual cost
$41,460/yr
At $3,455/mo median
Location
CityWalnut
StateCA
CountyLos Angeles County
Rent Market Meter
Strong Renter's Market
Renter's MarketBalancedLandlord's Market
Rents are down 1.6% year-over-year. Push hard on price, concessions, and lease terms.
Based on rent-price momentum (+1.6% YoY, -5.1% MoM), not inventory.
Demographics

Who lives here

ZIP 91789 (Walnut, CA) is majority owner-occupied, has a large retiree population, has a median income above the national average, 54.4% of residents hold a bachelor's degree or higher.

Population
40,298
Median income
$125,720
Median age
46.3
Renters
17.9%
Age distribution
19.8%
17.8%
23.4%
16.6%
22.3%
Under 1819.8%
18–3417.8%
35–5423.4%
55–6416.6%
65+22.3%
Gender
48.7%
51.3%
Male48.7%
Female51.3%
Race & ethnicity
12.6%
18.1%
67.8%
White12.6%
Black1.7%
Hispanic18.1%
Asian67.8%
Education (25+)
15%
24.4%
54.4%
No HS diploma6.2%
HS diploma15%
Some college24.4%
Bachelor's+54.4%
Housing tenure
82.1%
17.9%
Owner82.1%
Renter17.9%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2021 vs 2026

How ZIP 91789 in Walnut, CA has changed in 5 years

Income
$116,583 → $125,720
up 7.8%
Population
41,829 → 40,298
down 3.7%
Renter share
17.4% → 17.9%
+0.5 pts
Bachelor's+
53% → 54.4%
+1.4 pts
Median age
45.2 → 46.3
+1.1 yrs

Census figures show median household income at $125,720 today, compared with $116,583 five years earlier. Census counts show ZIP 91789 in Walnut, CA losing about 1,531 residents over the five-year window, down 3.7% on net.

Community

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Local insights

Tips for renters in ZIP 91789

About renting in ZIP 91789

Last updated: July 20, 2026

ZIP code 91789 covers Walnut, CA. The median rent here is $3,455/mo as of July 2026. A 1-bedroom rents for a median of $3,110/mo. A 2-bedroom rents for a median of $3,880/mo.

At 33% of local median household income ($125,720/yr), ZIP 91789 ranks as moderate compared to the national benchmark of 30%. Rents have increased 1.6% over the past year.

FAQ

Frequently asked questions

How much is rent in ZIP code 91789?

As of July 20, 2026, the median monthly rent in ZIP 91789 (Walnut, CA) is $3,455. This is based on aggregated data from public sources and community submissions.

How does ZIP 91789 rent compare to the US average?

ZIP 91789's median rent of $3,455/mo is $1,490 (76%) above the US national median of $1,965/mo.

How does ZIP 91789 compare to other ZIPs in California?

ZIP 91789 is one of the pricier ZIP codes in California, ranking #196 out of 907 ZIPs tracked at $3,455/mo.

How much income do you need to rent in ZIP 91789?

To keep rent at or below 30% of gross income, you would need to earn at least $138,000/year (~$66/hour full-time) to afford the median rent of $3,455/mo in ZIP 91789. The local median household income is $125,720/yr, meaning the typical household falls short of that threshold.

Is rent going up or down in ZIP 91789?

Rent in ZIP 91789 has increased 1.6% over the past year as of July 20, 2026, putting upward pressure on renter budgets.

Is ZIP 91789 an affordable place to rent?

ZIP 91789 is considered moderate for renters. At $3,455/mo, rent takes approximately 33% of the local median household income ($125,720/yr). The standard benchmark is 30%. ZIP 91789 slightly exceeds that threshold, so budgeting carefully matters here.

What percentage of ZIP 91789 residents rent vs. own?

According to Census data, approximately 17.9% of ZIP 91789 households are renters, while 82.1% are owner-occupied. ZIP 91789 leans toward homeownership, which can mean a smaller rental inventory.

When was rent data for ZIP 91789 last updated?

Rent data for ZIP 91789 reflects July 20, 2026. RentDataNow refreshes all data monthly using public and private datasets.
Income Affordability
33%
MODERATE

At $3,455/mo, rent takes ~33% of ZIP 91789's median household income ($125,720/yr). The standard benchmark is 30%.

ZIP 91789 33%Benchmark 30%
State income tax1–13.3%
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Schools nearby

Public schools near ZIP 91789 (Walnut, CA)

Recent submissions

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