Castle Rock, CO population, income and ZIP codes

Castle Rock town is a small city in Colorado, with 76,614 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #16 of 482 ranked by population — larger than 96% of them. The median age here is 35.8 years against 39.1 nationally, a slightly younger profile than the country as a whole. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Castle Rock town earn a median of $143,031 a year, 82.1% above the national figure of $78,538 and 65% above the $86,484 median for the 223 Colorado cities we cover. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 3.8% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Castle Rock town is valued at $621,700, 104.9% above the national figure and 37% above the $453,600 peer median, while median gross rent runs $1,946 a month, 38.4% above the national figure, or roughly $23,352 across a full year. A household on the local median income would put about 16.3% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 4.3×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 78.8% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.