gimmedastats
Wednesday, September 2, 2026
Population
65,001
US Census ACS 2024 5-year average
Median home value
$1,104,600
Owner-occupied units

Castro Valley, CA

California · 37.708° N, 122.063° W · 17 sq mi

Castro Valley is a city in California, with a population of 65,001 and about 3,858 residents per square mile. The median household earns $142,779 a year, and the median home is worth $1,104,600.

Conditions

Humidity & wind
—
UV index
—
Sunrise & sunset
—
Local time
—
Forgotten Flicks movie T-shirts on TeePublic

Size & density

Land area
17 sq mi
Water excluded
Population density
3,858
People per square mile
Rank by population
#657
Of cities on this site
Rank by area
#704
Of cities on this site

Money & housing

Median household income
$142,779
US median ≈ $78,538
Median gross rent
$2,554
Per month
Homeownership
72.5%
US ≈ 65%
Average commute
32.7 min
One way

People

Median age
42.9
US median 39.1
Bachelor's degree +
44.5%
Age 25 and over
Foreign born
31%
Households
22,021
2.9 people each

Climate · 2021–2025 average

Clear days 42/yr Mostly or fully clear sky
Days with rain 81/yr 0.01 in or more
Days with snow 3/yr
Days above 90° 13/yr
Below freezing 5/yr
Annual rainfall 28.2in Inches per year, scaled to 70 in — the rows above count days
Warmest month
August
Average high 78°F
Coldest month
February
Average low 40°F

What people here do for work

Education & health care 24.9%
Professional & business services 16.5%
Retail trade 9.1%
Manufacturing 7.8%

Top four industries · share of all workers · ACS 2024

Wealthiest person in California

Name
Mark Zuckerberg
Forbes, Apr 2025
Net worth
$189B
As of 25 Apr 2025 — not live
Lives in
Palo Alto
Source of wealth
Meta

Compiled from public reporting, not from an official dataset, and not independently verified.

Largest employer in California · private sector

Employer
University of California
Sector
Education

Compiled from public reporting, not from an official dataset, and not independently verified. Government employers are excluded.

Largest public company in California

Company
Apple
Revenue
$391.0B
Fiscal year 2024
Headquarters
Cupertino
Ticker
AAPL

Compiled from public reporting, not from an official dataset, and not independently verified.

State of California

State bird
California Quail
State flower
California Poppy
State capital
Sacramento
Nickname
The Golden State

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