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A double rainbow over Castle Rock, Colorado, seen from Miller Park with I-25 and the town below

Castle Rock, Colorado

Moving to Castle Rock

The guide I wish someone had handed me: what it costs, where people live, how the schools work, who your utilities are, and what to do on your first weekend. Every number checked at the source, with our own photos.

By Connor Tien, DougCo Social · Updated September 2026

← All Douglas County towns, compared

I write a weekly newsletter about Castle Rock, which mostly means I spend my weeks driving around town eating things and climbing stairs so you don't have to. So when people email asking "should we move to Castle Rock?" I have opinions. This hub and the five guides under it are the long version: the cost of living from the Census, the school system from the district, the utilities from the Town, and the fun stuff from actually going. If a fact has a number, the source is listed at the bottom of the page.

Population
83,815 (Census, July 2025 est.)
Since 2020
Up 14.6 percent
Median home value
$652,900 (ACS 2020-2024)
Trails in town
130+ miles

Castle Rock at a Glance

The numbers, each with its year and its source.

Population
83,815, July 1, 2025 estimate (Census Vintage 2025). 73,158 in the 2020 Census; 48,231 in 2010.
Land area
34.29 square miles (Census, 2020)
Median household income
$145,197 in 2024 dollars (ACS 2020-2024)
Median home value
$652,900, owner-occupied (ACS 2020-2024); median gross rent $2,000
Households
28,219, averaging 2.78 people; 78.8 percent owner-occupied (ACS 2020-2024)
Under 18
26.1 percent of residents (Census, 2025)
Mean commute
28.6 minutes (ACS 2020-2024)
Sales tax
8.1 percent: state 2.9, Douglas County 1, Town 4.2 (Town FAQ)
Elevation
The Rock Park trail climbs from 6,220 to 6,590 feet (Town of Castle Rock)
Trails and parks
104 miles of trails, 25 parks and 4,000+ acres of open space managed by the Town; 130+ miles and 6,900+ acres with partners
Schools
Douglas County School District: 45 elementary, 9 middle, 9 high, 6 alternative and 20 charter schools districtwide
The name
The butte got its name in 1859 from David Kellogg, a gold seeker who thought it looked like a castle (Town of Castle Rock)

Local tip: The Census and the Town both publish these numbers for free. If you see a moving site quoting a Castle Rock population of 85,000 or 90,000, it is guessing. The estimate the Census Bureau actually published for July 2025 is 83,815.

Why People Land Here

The short version of what I hear from readers who moved in the last few years.

The trails come up first, almost every time. The Town of Castle Rock manages 104 miles of them, and you can walk out of most neighborhoods onto one. Ridgeline Open Space connects The Meadows and Red Hawk to Miller Park by a pedestrian overpass, the East Plum Creek Trail runs 8.6 paved miles from Castle View High School down to Montaine, and in July 2026 the Town opened Lost Canyon Ranch, 716 acres with 15 miles of hiking trail, the largest open space purchase in its history. I hiked every open trail there the week it opened.

Then it is the schools (Douglas County School District, with an assigned neighborhood school for every address and open enrollment on top), the downtown (a real one, with a library, a museum, Festival Park and a couple of blocks of Wilcox and Perry Street that fill up on a Saturday), and the fact that a hospital, an outlet mall, a rec center and a 300-acre park with a 200-step staircase are all inside town limits.

And the growth is real, which is a good thing if you are arriving: the Census counted 73,158 people in 2020 and estimates 83,815 in 2025, and the restaurants and shops have kept pace. In the last year and a half we have covered new sushi, a reopened brewhouse turned proper kitchen, new owners at the downtown candy shop and a hospital system building an ER in Crystal Valley. You are not moving to a town that is finished.

The Millhouse event center and its pond at Philip S. Miller Park in Castle Rock
The Millhouse pond at Philip S. Miller Park, September 2026 · Photo: DougCo Social

Explore Castle Rock

The rest of the site, sorted for a newcomer.

Moving somewhere else in the county? We have guides for Parker, Highlands Ranch, Lone Tree and Castle Pines.

FAQ

How big is Castle Rock, Colorado?

The Census Bureau estimated 83,815 people as of July 1, 2025 (Vintage 2025), up 14.6 percent from the 2020 Census count of 73,158. The town covers 34.29 square miles.

Is Castle Rock expensive to live in?

Per the American Community Survey (2020-2024), the median owner-occupied home value in Castle Rock is $652,900 and the median gross rent is $2,000 a month. Median household income over the same period is $145,197 (in 2024 dollars). The combined sales tax rate is 8.1 percent (state 2.9, county 1, Town 4.2).

What is the commute like from Castle Rock?

The Census reports a mean travel time to work of 28.6 minutes for Castle Rock workers (ACS 2020-2024). I-25 runs straight through town, and the Town is planning a new interchange at Crystal Valley Parkway on the south end.

What school district serves Castle Rock?

Douglas County School District (DCSD). Every address has an assigned neighborhood school, and families can also apply to any other DCSD school through open enrollment. Castle Rock has two DCSD high schools (Castle View and Douglas County), two middle schools, nine elementary schools and four charter schools in town.

How much trail is there in Castle Rock?

The Town of Castle Rock manages 104 miles of trails, 25 parks and more than 4,000 acres of open space, and with partner agencies residents have access to over 130 miles of trails, 60-plus parks and more than 6,900 acres of open space inside town limits.

Castle Rock Crew · free weekly email

I send the week's things to do in Castle Rock every Tuesday morning. No crime, no politics, no noise.

Sources

Every figure on this page was read at the source on September 29, 2026. Population and housing numbers are the Census Bureau's; trail, park and tax figures are the Town of Castle Rock's; school counts are the district's.

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