Population

83,815

US Census estimate, July 2025

Median home value

$652,900

Owner-occupied units

Castle Rock, CO

Colorado · 39.376° N, 104.853° W · 35 sq mi

Castle Rock is a city in Colorado, with a population of 83,815 and about 2,412 residents per square mile. The median household earns $145,197 a year, and the median home is worth $652,900.

Conditions

Humidity & wind

—

UV index

—

Sunrise & sunset

—

Local time

—

Forgotten Flicks movie T-shirts on TeePublic

Size & density

Land area

35 sq mi

Water excluded

Population density

2,412

People per square mile

Rank by population

#458

Of cities on this site

Rank by area

#396

Of cities on this site

Money & housing

Median household income

$145,197

US median ≈ $78,538

Median gross rent

$2,000

Per month

Homeownership

78.8%

US ≈ 65%

Average commute

28.6 min

One way

People

Median age

36.5

US median 39.1

Bachelor's degree +

55.9%

Age 25 and over

Foreign born

5.6%

Households

28,219

2.78 people each

Climate · 2021–2025 average

Clear days 37^/yr Mostly or fully clear sky

Days with rain 136^/yr 0.01 in or more

Days with snow 68^/yr

Days above 90° 11^/yr

Below freezing 175^/yr

Annual rainfall 22.8ⁱⁿ Inches per year, scaled to 70 in — the rows above count days

Warmest month

July

Average high 84°F

Coldest month

January

Average low 10°F

What people here do for work

Education & health care 20.4^%

Professional & business services 16.8^%

Finance, insurance & real estate 10.4^%

Retail trade 9.8^%

Top four industries · share of all workers · ACS 2024

Wealthiest person in Colorado

Name

Philip Anschutz

Forbes, Apr 2025

Net worth

$16.9B

As of 25 Apr 2025 — not live

Lives in

Denver

Source of wealth

Energy, sports, entertainment

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

Largest employer in Colorado · private sector

Employer

UCHealth

Sector

Healthcare

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

Largest public company in Colorado

Company

Arrow Electronics

Revenue

$27.9B

Fiscal year 2024

Headquarters

Centennial

Ticker

ARW

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

State of Colorado

State bird

Lark Bunting

State flower

Rocky Mountain Columbine

State capital