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

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UV index

—

Sunrise & sunset

—

Local time

—

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

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

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.

Forgotten Flicks movie T-shirts on TeePublic

State of California

State bird

California Quail

State flower

California Poppy

State capital

Sacramento

Nickname

The Golden State

Compare Castro Valley with

Castro Valley vs San LeandroSide by side
Castro Valley vs Union CitySide by side
Castro Valley vs Four CornersSide by side
Castro Valley vs WalthamSide by side
Castro Valley vs HaywardSide by side
Castro Valley vs Los AngelesSide by side

Cities near Castro Valley

San Leandro, CA5 mi · 85,353
Hayward, CA6 mi · 157,113
San Ramon, CA8 mi · 86,209
Union City, CA8 mi · 65,282
Dublin, CA9 mi · 71,602
Oakland, CA10 mi · 440,838
Pleasanton, CA10 mi · 74,556
Alameda, CA11 mi · 76,876