ZIP Code · CA

ZIP 91901

Part of Alpine, CA

Pop. 18,197·San Diego County·724th most expensive ZIP in California

Median rent (all units)

$2,274/mo

Year-over-Year

+1.6%

Month-over-Month

-0.3%

vs US Median

+$342

Reported rents

Stable (Monthly)

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Most AffordableMost Expensive

ZIP 91901 · $2,274

More expensive than 73% 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

$2,160

1 BR

$2,320

2 BR

$2,830

3 BR

$3,770

4 BR+

$4,570

Research median

$2,830/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

Compared with the peak

Rent in ZIP 91901 is 1.2% below its high of $2,301 in May 2026, at $2,274 as of September 2026.

Past year vs. the rest of California

Rent in ZIP 91901 changed +1.6% over the year to September 2026. Across the 819 California ZIP codes Zillow tracks, the typical change was +3.2%.

Recent direction

Rent has fallen 2 months in a row, and rose in 6 of the last 12 months.

What a typical income covers

30% of the median household income ($114,167) is $2,854 a month. That covers HUD's Fair Market Rent for up to a 2-bedroom ($2,830); a 3-bedroom is $3,770.

From Zillow's monthly rent index (ZORI) for ZIP 91901. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$27,288/yr

At $2,274/mo median

Location

CityAlpine

StateCA

CountySan Diego County

Rent Market Meter

Balanced Market

Renter's MarketBalancedLandlord's Market

Rents are roughly steady, with neither renters nor landlords holding a strong edge right now.

Based on rent-price momentum (+1.6% YoY, -0.3% MoM), not inventory.

Demographics

Who lives here

ZIP 91901 (Alpine, CA) is majority owner-occupied, has a median income above the national average, 31.3% of residents hold a bachelor's degree or higher.

Population

18,197

Median income

$114,167

Median age

42.2

Renters

25.2%

Age distribution

20.1%

20.8%

27.3%

13.8%

18%

Under 1820.1%

18–3420.8%

35–5427.3%

55–6413.8%

65+18%

Gender

50.3%

49.7%

Male50.3%

Female49.7%

Race & ethnicity

77.5%

18.8%

White77.5%

Black1.9%

Hispanic18.8%

Asian1.1%

Other0.7%

Education (25+)

23.4%

39%

31.3%

No HS diploma6.3%

HS diploma23.4%

Some college39%

Bachelor's+31.3%

Housing tenure

74.8%

25.2%

Owner74.8%

Renter25.2%

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

2023 vs 2026

How ZIP 91901 in Alpine, CA has changed in 5 years

Rent

$2,157 → $2,274

up 5.4%

Income

$105,679 → $114,167

up 8.0%

Population

18,367 → 18,197

down 0.9%

Renter share

26.3% → 25.2%

-1.1 pts

Bachelor's+

33.5% → 31.3%

-2.2 pts

The median rent in ZIP 91901 in Alpine, CA stood at $2,157 in 2023 and currently runs about $2,274, reflecting a 5.4% increase over the period. On the earnings side, the typical household in ZIP 91901 in Alpine, CA now reports about $114,167, up from $105,679 in 2021. College-educated residents now make up 31.3% of adults here, versus 33.5% in 2021. For context, the 2023 to 2026 window covers an unusually volatile run for US rents nationally, and ZIP 91901 in Alpine, CA reflects that arc in its own way.

Community

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Local insights

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About renting in ZIP 91901

Last updated: October 17, 2026

ZIP code 91901 covers Alpine, CA. The median rent here is $2,274/mo as of October 2026. A 1-bedroom rents for a median of $2,320/mo. A 2-bedroom rents for a median of $2,830/mo.

At 24% of local median household income ($114,167/yr), ZIP 91901 ranks as affordable compared to the national benchmark of 30%. Rents have increased 1.6% over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 91901?

To keep rent at or below 30% of gross income, you would need to earn at least $91,000/year (about $44/hour full-time) to afford the median rent of $2,274/mo in ZIP 91901. The local median household income is $114,167/yr, so the typical household meets that bar.

Is rent going up or down in ZIP 91901?

Rent in ZIP 91901 has risen 1.6% over the past year as of September 2026. It sits 1.2% below its high of $2,301 in May 2026.

How does ZIP 91901 compare to other ZIPs in California?

ZIP 91901 is one of the more affordable among California ZIP codes for rent, ranking #724 of 898 at $2,274/mo. Over the year to September 2026, rent in ZIP 91901 changed +1.6%, against a typical +3.2% across the 819 California ZIP codes Zillow tracks.