Population 89,865 · Census ACS 2020–24
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Population and households in Castle Rock
Household size in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.85 | 2.58 | 2.57 | 2.68 |
| 2010–14 | 2.92 | 2.66 | 2.63 | 2.73 |
| 2015–19 | 2.89 | 2.68 | 2.64 | 2.71 |
| 2020–24 | 2.78 | 2.57 | 2.54 | 2.65 |
| Change | −0.07 | −0.01 | −0.04 | −0.03 |
Households in Castle Rock average 2.78 people, a bit above the national 2.65, so families with children are somewhat more common here. Since 2006–10, household size has edged down from 2.85, mirroring the country. Households are largest in the east and smallest in the south.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 36.0 | 36.7 | 36.9 | 37.7 |
| 2010–14 | 37.2 | 37.3 | 37.7 | 38.6 |
| 2015–19 | 38.3 | 38.0 | 38.5 | 39.6 |
| 2020–24 | 38.4 | 38.5 | 39.1 | 40.1 |
| Change | +2.4 | +1.8 | +2.1 | +2.3 |
Castle Rock is a little younger than the country as a whole: its median age is 38.4, against 40.1 nationally. That is in line with the rest of the Denver area. Since 2006–10, the median age has climbed from 36.0, mirroring the country.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.8% | 10.8% | 10.5% | 12.3% |
| 2010–14 | 8.9% | 11.0% | 10.8% | 12.3% |
| 2015–19 | 8.1% | 9.8% | 9.5% | 11.6% |
| 2020–24 | 7.3% | 9.6% | 9.3% | 11.6% |
| Change | −0.6 pts | −1.2 pts | −1.1 pts | −0.6 pts |
Single parents head only 7.3% of households in Castle Rock, well below the national share of 11.6%. The single-parent share is down 0.6 points from 2006–10, as it has nationally.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Castle Rock
Renters in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 20.2% | 33.5% | 32.4% | 33.3% |
| 2010–14 | 21.5% | 36.4% | 35.2% | 35.6% |
| 2015–19 | 20.8% | 36.1% | 34.8% | 36.0% |
| 2020–24 | 19.1% | 35.9% | 33.8% | 34.8% |
| Change | −1.1 pts | +2.4 pts | +1.4 pts | +1.5 pts |
Only 19.1% of households in Castle Rock rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Just over one in six owners (17.5%) have paid off their mortgages, well below the national share of 39.8%. Renting is most common in the south and least common in the northeast. The renter share is down 1.1 points from 2006–10, even as the national share rose.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.0% | 8.5% | 10.3% | 11.4% |
| 2010–14 | 5.6% | 6.6% | 8.7% | 11.4% |
| 2015–19 | 3.5% | 5.5% | 8.0% | 11.1% |
| 2020–24 | 4.7% | 6.0% | 7.3% | 9.6% |
| Change | −1.3 pts | −2.5 pts | −3.0 pts | −1.8 pts |
Empty homes are scarce in Castle Rock: just 4.7% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. The picture is much the same across the Denver area. Vacancy is down 1.3 points from 2006–10, as it has nationally.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 1999 | 1980 | 1981 | 1974 |
| 2010–14 | 1999 | 1981 | 1982 | 1975 |
| 2015–19 | 2001 | 1982 | 1983 | 1977 |
| 2020–24 | 2007 | 1987 | 1988 | 1980 |
| Change | +8 | +8 | +7 | +6 |
Castle Rock has newer housing than the country as a whole: the median home was built in 2007, versus 1980 nationally. The median year built has moved up from 1999 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northeast, while the center has the oldest housing. Only seven of the 133 Colorado cities with 5,000+ people have newer homes.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,436 | $1,128 | $1,051 | $965 |
| 2010–14 | $1,669 | $1,245 | $1,165 | $1,040 |
| 2015–19 | $1,865 | $1,606 | $1,450 | $1,213 |
| 2020–24 | $2,400 | $2,181 | $1,963 | $1,571 |
| Change | +$965 | +$1,053 | +$912 | +$606 |
A typical rental in Castle Rock costs $2,400 a month with utilities, well above the national median of $1,571. Rents are up $965 a month from 2006–10, a 67% jump, faster than rents rose nationally. The typical renter here spends 39.1% of household income on rent, well over the 30% mark often used to define affordable rent, so many renters here are stretched. The priciest rents are in the northeast; the most affordable are in the center.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Castle Rock
Bachelor's degrees in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 49.3% | 38.1% | 36.4% | 28.4% |
| 2010–14 | 51.6% | 40.0% | 37.8% | 29.6% |
| 2015–19 | 50.9% | 43.5% | 40.9% | 32.1% |
| 2020–24 | 59.3% | 49.1% | 45.9% | 35.6% |
| Change | +10.0 pts | +11.0 pts | +9.4 pts | +7.2 pts |
Castle Rock is highly educated: about six in ten adults 25 and older (59.3%) hold at least a bachelor's degree, far above the national share of 35.6%. Since 2006–10, the share with a degree has risen 10.0 points, in line with the national trend. College graduates are most concentrated in the northwest and least in the center.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 96.8% | 88.8% | 89.5% | 84.9% |
| 2010–14 | 95.8% | 89.8% | 90.5% | 86.1% |
| 2015–19 | 97.8% | 91.1% | 91.8% | 87.7% |
| 2020–24 | 97.7% | 92.1% | 92.8% | 89.3% |
| Change | +0.9 pts | +3.3 pts | +3.3 pts | +4.3 pts |
Finishing high school is nearly universal in Castle Rock: 97.7% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma is up 0.9 points from 2006–10, a smaller shift than nationally. Castle Rock has a higher share of high school graduates than the great majority of Colorado cities.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Castle Rock
| Period | Castle Rock | Denver area | Colorado | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.2% | 6.8% | 6.8% | 8.1% |
| 2010–14 | 5.6% | 7.5% | 7.9% | 9.4% |
| 2015–19 | 2.9% | 3.7% | 4.4% | 5.6% |
| 2020–24 | 4.3% | 4.4% | 4.6% | 5.4% |
| Change | −0.9 pts | −2.4 pts | −2.3 pts | −2.7 pts |
Jobs have been a little easier to find in Castle Rock than nationally: unemployment was 4.3%, against 5.4%. Since 2006–10, unemployment has edged down 0.9 points, as it has nationally. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Castle Rock compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Castle Rock | 2.78 | 38.4 | 7.3% | 19.1% | 4.7% | 2007 | $2,400 | 59.3% | 97.7% | 4.3% |
| Castle Pines North | 2.78 | 45.5 | 5.1% | 19.9% | 2.8% | 2002 | $2,523 | 68.4% | 99.3% | 3.2% |
| Sedalia | 2.80 | 51.6 | 4.0% | 8.2% | 9.2% | 1998 | $2,384 | 60.3% | 98.8% | 2.4% |
| The Pinery | 2.88 | 44.7 | 2.1% | 3.2% | 2.5% | 1999 | $2,731 | 65.1% | 96.6% | 2.8% |
| Franktown | 2.87 | 46.4 | 2.0% | 5.1% | 5.9% | 1995 | $2,221 | 59.4% | 98.4% | 2.2% |
| Shamballah-Ashrama | 2.47 | 47.9 | 4.7% | 12.1% | 5.7% | 2002 | $2,817 | 61.8% | 98.8% | 1.5% |
| Louviers | 2.54 | 45.2 | 6.1% | 13.9% | 3.5% | 2011 | $3,389 | 68.3% | 99.1% | 2.4% |
| Parker | 2.88 | 37.1 | 9.9% | 23.6% | 5.1% | 2004 | $2,438 | 55.8% | 96.0% | 2.7% |
| Stonegate | 2.76 | 38.6 | 4.6% | 15.7% | 1.0% | 2001 | $2,265 | 59.6% | 98.0% | 2.8% |
| Lone Tree | 2.25 | 42.7 | 6.3% | 43.7% | 5.2% | 2002 | $2,459 | 71.1% | 98.6% | 3.3% |
| Meridian | 2.19 | 29.0 | 4.7% | 82.0% | 7.2% | 2005 | $2,068 | 44.0% | 98.3% | 8.3% |
All figures 2020–24.
Cities with similar populations: Bloomington, IN · Broken Arrow, OK · Brownsville, TX · Bloomington, IL · Bowling Green, KY · Bloomington, MN · Buckeye, AZ · Boca Raton, FL · Bethlehem, PA · Bronx, NY
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Castle Rock. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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