Castle Rock Population

1880–2026

86,094

2026 projection

16.5% since 2020 (increase)

020K40K60K80K100K18801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Castle Rock. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202686,094+2,2792.72%
202583,815+8110.98%
202483,004+1,4811.82%
202381,523+1,3591.70%
202280,164+3,5054.57%
202176,659+2,7713.75%
202073,888+6,1509.08%
201967,738+2,7334.20%
201865,005+2,6874.31%
201762,318+2,1243.53%

Showing 10 of 30 years.

Castle Rock Demographics

36.5median age

Median age

Female36.4 yrs
Male36.5 yrs

Adults

58,503
9,035 seniors · 15%49,468 other adults

Sex

Female 50.5% · 39,960Male 49.5% · 39,163

Population by age

MaleFemale85+ years, male: 22485+ years, female: 39780–84 years, male: 27480–84 years, female: 44275–79 years, male: 79275–79 years, female: 88770–74 years, male: 1,39870–74 years, female: 1,27365–69 years, male: 1,55065–69 years, female: 1,79860–64 years, male: 1,80660–64 years, female: 2,29155–59 years, male: 2,16555–59 years, female: 1,94350–54 years, male: 2,58050–54 years, female: 2,47445–49 years, male: 3,29145–49 years, female: 2,89240–44 years, male: 3,31540–44 years, female: 3,14935–39 years, male: 3,38935–39 years, female: 3,38630–34 years, male: 2,93130–34 years, female: 3,60125–29 years, male: 2,33925–29 years, female: 1,70820–24 years, male: 2,17620–24 years, female: 2,19115–19 years, male: 2,43615–19 years, female: 3,10110–14 years, male: 2,80810–14 years, female: 2,8085–9 years, male: 3,0255–9 years, female: 2,8070–4 years, male: 2,6640–4 years, female: 2,81285+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K2K2K3K3K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 791 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Castle Rock Income

$145,197median household income

Median household income

$145,197

Half of households earn more, half earn less

Median earnings

$81,556

Typical yearly pay for a worker 25 or older.

Poverty rate

3.8%

About 1 in 26 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Castle Rock Marital Status

61% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married61%63%59%
Never married26%27%25%
Divorced10%9%10%
Widowed3%1%4%
Separated<1%<1%1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year