Alum Rock is an unincorporated community in Santa Clara County, CA. It has no city government: the county runs it, and the Census counts it as its own place.

What it's like to live in Alum Rock

Alum Rock is an unincorporated community in California with household incomes running above the national average. Those factors carry real weight for anyone weighing where to move next.

The tradeoffs are worth naming plainly. Alum Rock deals with rent well above the national average, home prices well above the national average, air quality that falls short of national benchmarks, and a car-dependent commute, with few people using transit.

The good

  • Higher-than-average incomes

The not so good

  • Rent well above the national average
  • High home prices
  • Air quality concerns
  • Car-dependent — few commuters use transit

How Alum Rock compares

Median household income

Alum Rock$126,705
California avg$99,122
US$80,734

Median rent (per month)

Alum Rock$2,389
California avg$2,036
US$1,413

Median home value

Alum Rock$909,500
California avg$734,700
US$332,700

What it takes to move to Alum Rock

Based on Alum Rock's median rent, home value and household income

To rent

$4,778

up front: first month plus a typical one-month deposit

  • Income to keep rent under 30%: $95,560 a year
  • 49% of Alum Rock renters spend 30% or more of their income on rent

To buy

$181,900

a 20% down payment on the median home

  • With 10% down: $90,950
  • Homes cost 7.2× the typical local household income (US: 4.1×)

Moving costs, closing costs and taxes not included.

The details

Cost of living▲ 69% above US

$2,389/mo median rent

Rent is expensive here, at $2,389 a month median and well above the national average. This is the kind of city where housing costs deserve serious budgeting before committing to a move. Home prices are steep, with a median around $909,500. Renting first to get a feel for the city before buying is often the more practical route.

Median home value $909,500 · 49% of renters cost-burdened

Job market

4.3% county unemployment

Unemployment in Santa Clara County is 4.3%, close to the national average of 4.3%. That's the county-wide rate; BLS doesn't measure a place this size on its own.

Santa Clara County (county-wide)

Safety

252 violent crimes per 100k, whole jurisdiction

Alum Rock doesn't have its own police department, so there's no crime rate for it alone. The figures shown are for the Santa Clara County Sheriff's Office jurisdiction as a whole, which runs below the national average for violent crime and covers many communities. Individual neighborhoods can differ a lot from that overall rate.

Property crime 1538/100k · Policed by Santa Clara County Sheriff's Office (county-wide rate) · 2025 data

Getting aroundNear US average

28 min average commute

Commutes run about average, at 27.9 minutes. Fine day to day, but it adds up over a year, and where someone lives relative to where they work starts to matter. 9 in 10 workers drive to work; 8% work from home.

How workers get to work

Drive alone
76%
Carpool
11%
Work from home
7.7%
Other
2.6%
Walk
2.0%
Public transit
0.5%

Climate

Summers are warm, with highs around 82°F, and winters are mild, with lows rarely dropping below 44°F. It's a dry climate with limited rainfall.

Average month

High °FLow °FPrecip (in)
30°50°70°90°3.5"Jan: 2.97" precipitationFeb: 3.24" precipitationMar: 2.64" precipitationApr: 1.24" precipitationMay: 0.54" precipitationJun: 0.17" precipitationJul: 0.01" precipitationAug: 0.03" precipitationSep: 0.07" precipitationOct: 0.80" precipitationNov: 1.36" precipitationDec: 3.07" precipitationJJan: high 59°F, low 43°FFFeb: high 63°F, low 45°FMMar: high 66°F, low 48°FAApr: high 70°F, low 50°FMMay: high 75°F, low 53°FJJun: high 80°F, low 57°FJJul: high 82°F, low 59°F83°AAug: high 83°F, low 60°FSSep: high 81°F, low 58°FOOct: high 75°F, low 54°FNNov: high 65°F, low 47°F43°DDec: high 59°F, low 43°F

30-year averages, 1991–2020

Education & workforce▼ 31% below US

25% bachelor's degree or higher

College degree attainment runs below average at 25%. That tends to reflect a more trade and working-class economy, which can be great or limiting depending on the industry.

Schools

0 public schools inside the boundary

No public school is located inside the boundary; students attend schools in the surrounding district.

Parks & recreation

The nearest national park or historic site is Eugene O'Neill National Historic Site (34 miles away). There are 8 national parks and sites within a day's drive.

Bottom line

Alum Rock's strongest point is household incomes running above the national average; the main tradeoffs are rent well above the national average and home prices well above the national average. A year of median rent ($2,389/mo) equals 23% of the median household income here, about the same as the 21% typical nationwide. It may be a harder fit for renters on a tight budget and anyone who doesn't drive.

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