Castle Rock, Colorado Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Castle Rock, Colorado is 76,614 as of the 2023 American Community Survey, making it the 16th-largest city in Colorado. The median household income is $143,031, the median home value is $621,700, and the median age is 35.8.
The population has grown 71.3% since 2010 (48,586 → 83,213).
76,614
Population
2205
People / sq mi
$143,031
Median Income
$621,700
Median Home Value
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Castle Rock covers 34.7 sq mi of land at 2205 people per square mile.
About Castle Rock, CO
Castle Rock is distinguished by its share of foreign-born residents, 55.6% of the population. Castle Rock is a city in Colorado with a population of 76,614. It ranks #16 among cities in Colorado by population.
Earnings sit at the high end: a median household income of $143,031, above the US median of $78,538. Hardship is rare relative to US cities: a poverty rate of just 2.3%, below the national 12.4%. The median home value is $621,700, with typical rent around $1,946.
College attainment is above the local norm at 54.9%, above the national 35.0%. An unusually large 25.3% of workers are remote, above the national 14.0%, and the average commute runs about 29 minutes each way.
The large foreign-born share is a defining thread in Castle Rock, shaping language, household composition, and the labor force behind the economic figures above.
Castle Rock town Population History (2010-2024)
The city of Castle Rock town had a population of 48,586 in 2010 and 83,213 in 2024, a 71.3% growth over 14 years. The peak was 83,213 in 2024. Average annual growth rate: 3.93%.
83,213
Population (2024)
48,586
Population (2010)
83,213
Peak (2024)
3.93%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 48,586 |
| 2011 | 49,693 |
| 2012 | 51,017 |
| 2013 | 52,657 |
| 2014 | 55,154 |
| 2015 | 57,175 |
| 2016 | 59,284 |
| 2017 | 62,297 |
| 2018 | 65,000 |
| 2019 | 68,484 |
| 2020 | 73,888 |
| 2021 | 76,657 |
| 2022 | 80,235 |
| 2023 | 81,654 |
| 2024 | 83,213 |
Race & Ethnicity
| White | 83.5% |
| Black or African American | 0.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.9% |
| Two or More Races | 0.0% |
Economy & Income
$143,031
Median Household Income
$58,993
Per Capita Income
2.3%
Poverty Rate
3.3%
Unemployment Rate
Housing
$621,700
Median Home Value
$1,946
Median Rent
78.8%
Owner-Occupied
Education
97.4%
High School+
54.9%
Bachelor's+
Commute
0.2%
Drive Alone
66.5%
Public Transit
25.3%
Work From Home
29.2 min
Avg Commute
Community Profile
55.6%
Foreign Born
91.9%
Non-English at Home
8.2%
Veterans
7.3%
With Disability
95.1%
Health Insurance
98.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 21.5% |
| Finance, Insurance & Real Estate | 16.1% |
| Information | 9.7% |
| Education, Health Care & Social Services | 8.9% |
| Manufacturing | 6.7% |
| Public Administration | 6.3% |
| Construction | 6.0% |
| Transportation & Warehousing | 3.9% |
| Retail Trade | 3.6% |
| Arts, Entertainment & Food Services | 3.4% |
| Agriculture & Mining | 1.2% |
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City rankings
Frequently Asked Questions
Castle Rock, Colorado has a population of 76,614 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 16th-largest city in Colorado.
The median household income in Castle Rock, Colorado is $143,031, with 2.3% of residents living below the federal poverty level.
The median home value in Castle Rock, Colorado is $621,700, with median monthly rent at $1,946 and a homeownership rate of 78.8%.
The median age in Castle Rock, Colorado is 35.8 years. The population is 49.2% male and 50.8% female.
The population has grown 71.3% since 2010 (48,586 → 83,213).
Where to stay in Castle Rock
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.