ZIP Code · CA

ZIP 92831

Part of Fullerton, CA

Pop. 35,618·Orange County·608th most expensive ZIP in California

Median rent (all units)

$2,517/mo

Year-over-Year

+6.0%

Month-over-Month

+0.6%

vs US Median

+$585

Reported rents

Rising (Monthly)

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Most AffordableMost Expensive

ZIP 92831 · $2,517

More expensive than 80% of US ZIP codes · National median $1,932/mo

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Compare your rent to the local median.

Medians by bedroom

Rent by unit size

Studio

$1,891

1 BR

$1,935

2 BR

$2,278

3 BR

$3,096

4 BR+

$3,695

Research median

$2,278/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: October 17, 2026

From the history

What the numbers show

Cheapest month to sign

February. Asking rents in ZIP 92831 usually run 0.7% below trend in February and 0.4% above it in May, about $28 a month apart at today's median. Based on 6 years of data.

Compared with the peak

Rent in ZIP 92831 is at its highest level since Zillow's records here began in April 2020.

Past year vs. the rest of California

Rent in ZIP 92831 changed +6.0% over the year to September 2026. Across the 819 California ZIP codes Zillow tracks, the typical change was +3.2%.

Recent direction

Rent has risen 3 months in a row, and rose in 9 of the last 12 months.

What a typical income covers

30% of the median household income ($89,278) is $2,232 a month. That is less than HUD's Fair Market Rent for a studio ($2,590).

Rank in Fullerton

1st cheapest of 4 ZIP codes in Fullerton.

Cheaper nearby

ZIP 90602, 10 miles away, rents for 16% less ($2,116/mo), about $4,800 a year in savings.

From Zillow's monthly rent index (ZORI) for ZIP 92831. The seasonal pattern compares Zillow’s seasonally adjusted and unadjusted series. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$30,204/yr

At $2,517/mo median

Location

CityFullerton

StateCA

CountyOrange County

Rent Market Meter

Strong Landlord's Market

Renter's MarketBalancedLandlord's Market

Rents are up 6.0% year-over-year. Expect competition, and move quickly to lock in terms.

Based on rent-price momentum (+6.0% YoY, +0.6% MoM), not inventory.

Demographics

Who lives here

ZIP 92831 (Fullerton, CA) is majority renter-occupied, skews toward younger working-age adults, 44.7% of residents hold a bachelor's degree or higher.

Population

35,618

Median income

$89,278

Median age

32.4

Renters

59%

Age distribution

17.6%

35.7%

23.8%

Under 1817.6%

18–3435.7%

35–5423.8%

55–6411.1%

65+11.8%

Gender

50.4%

49.6%

Male50.4%

Female49.6%

Race & ethnicity

41.9%

41%

18.1%

White41.9%

Black2.9%

Hispanic41%

Asian18.1%

Education (25+)

15.6%

27.9%

44.7%

No HS diploma11.8%

HS diploma15.6%

Some college27.9%

Bachelor's+44.7%

Housing tenure

41%

59%

Owner41%

Renter59%

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

2021 vs 2026

How ZIP 92831 in Fullerton, CA has changed in 5 years

Rent

$1,800 → $2,517

up 39.8%

Income

$79,461 → $89,278

up 12.4%

Population

36,859 → 35,618

down 3.4%

Renter share

57.8% → 59%

+1.2 pts

Bachelor's+

43.7% → 44.7%

+1.0 pts

Median age

29.8 → 32.4

+2.6 yrs

Five years ago, renters in ZIP 92831 in Fullerton, CA paid around $1,800 a month. That figure now sits near $2,517, up 39.8% from the 2021 baseline. On the earnings side, the typical household in ZIP 92831 in Fullerton, CA now reports about $89,278, up from $79,461 in 2021. Because rent grew faster than wages over the same span, the affordability picture has tightened relative to 2021. Census counts show ZIP 92831 in Fullerton, CA losing about 1,241 residents over the five-year window, down 3.4% on net. For context, the 2021 to 2026 window covers an unusually volatile run for US rents nationally, and ZIP 92831 in Fullerton, CA reflects that arc in its own way.

Community

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Local insights

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About renting in ZIP 92831

Last updated: October 17, 2026

ZIP code 92831 covers Fullerton, CA. The median rent here is $2,517/mo as of October 2026. A 1-bedroom rents for a median of $1,935/mo. A 2-bedroom rents for a median of $2,278/mo.

At 34% of local median household income ($89,278/yr), ZIP 92831 ranks as moderate compared to the national benchmark of 30%. Rents have increased 6.0% over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 92831?

To keep rent at or below 30% of gross income, you would need to earn at least $101,000/year (about $49/hour full-time) to afford the median rent of $2,517/mo in ZIP 92831. The local median household income is $89,278/yr, so the typical household falls short of that bar.

Is rent going up or down in ZIP 92831?

Rent in ZIP 92831 has risen 6.0% over the past year as of September 2026. That is the highest level since Zillow's records here began in April 2020.

When is the cheapest time to rent in ZIP 92831?

Asking rents in ZIP 92831 are usually lowest in February, about 0.7% below their yearly trend, and highest in May, about 0.4% above it. At today's median that is a gap of roughly $28 a month. This pattern comes from 6 years of Zillow rent data.

How does ZIP 92831 compare to other ZIPs in California?

ZIP 92831 is one of the more affordable among California ZIP codes for rent, ranking #608 of 898 at $2,517/mo. Over the year to September 2026, rent in ZIP 92831 changed +6.0%, against a typical +3.2% across the 819 California ZIP codes Zillow tracks.