Castle Rock, CO Census Data
The 16th largest city in Colorado by population · 20 cities ranked
Castle Rock is the 16th largest city in Colorado by population and ranks 2nd of 20 for median household income. With 76,614 residents, it has a lower poverty rate than 16 other Colorado cities. This snapshot draws from the 2023 American Community Survey (ACS) 5-year estimates.
Updated: 2026-04-13 · Source: U.S. Census Bureau, ACS 2023
Population
76,614
49.2% male · 50.8% female
Median Age
35.8
2.9 below the national average (38.7 yrs)
Median Household Income
$143,031
$64,493 above the national average ($78,538)
Bachelor's Degree or Higher
54.9%
19.9% above the national average (35.0%)
HS diploma or higher: 97.4%
Poverty Rate
3.8%
8.6% below the national average (12.4%)
Uninsured: 4.9%
Broadband Access
98.1%
8.4% above the national average (89.7%)
Median Home Value
$621,700
Median rent: $1,946 · 79% owner-occupied
Unemployment Rate
4.5%
Labor force participation: 70.8%
Per Capita Income
$64,394
Individual average income (not household)
Veteran Population
8.2%
Disability rate: 7.3%
How Castle Rock Compares to Other Colorado Cities
Rankings among all 20 Colorado cities tracked in the 2023 ACS.
| Ranking | Position | Tier |
|---|---|---|
| Largest by Population | 16th of 20 | Bottom 25% |
| Highest Median Income | 2nd of 20 | Top 10% |
| Lowest Poverty Rate | 4th of 20 | Top 25% |
| Highest Bachelor's Attainment | 7th of 20 | Top half |
| Highest Home Value | 5th of 20 | Top 25% |
Demographics
Race & Ethnicity
Age Distribution
Commute to Work
Castle Rock, CO Frequently Asked Questions
What is the population of Castle Rock, CO?
The population of Castle Rock, CO is 76,614 according to the 2023 American Community Survey 5-year estimates. The median age is 35.8 years.
What is the median household income in Castle Rock?
The median household income in Castle Rock, CO is $143,031, above the national average of $78,538. Per capita income is $64,394.
What is the poverty rate in Castle Rock?
The poverty rate in Castle Rock, CO is 3.8%, compared to the national average of 12.4%. About 4.9% of residents lack health insurance.
What percentage of Castle Rock residents have a college degree?
54.9% of adults (25+) in Castle Rock hold a bachelor's degree or higher, and 97.4% have at least a high school diploma. The national average for bachelor's degree holders is 35.0%.
What is the median home value in Castle Rock?
The median home value in Castle Rock, CO is $621,700. Median rent is $1,946 per month, with 79% of housing units owner-occupied.
What is the racial makeup of Castle Rock?
Castle Rock's population is 83.5% White, 0.9% Black, 11.3% Hispanic or Latino, and 2.2% Asian (source: 2023 ACS).
How does Castle Rock rank among Colorado cities?
Castle Rock is the 16th largest city in Colorado by population, the 2nd highest for median household income, the 4th lowest for poverty rate, the 7th highest for bachelor's degree attainment among 20 ranked Colorado cities.
What is the unemployment rate in Castle Rock?
The unemployment rate in Castle Rock, CO is 4.5%, with a labor force participation rate of 70.8%. Per capita income is $64,394.
Cities Similar to Castle Rock
Other Colorado cities with comparable population and income levels.