Castle Rock city, Washington Demographics & Population 2026

Population Overview

Castle Rock city is a small community located in Washington. The total population is 2,298. It ranks as the 298th most populous out of 631 cities and towns in Washington.

Age Demographics

The median age in Castle Rock city is 31.1 years. This is 19% lower than the state median of 38.2 years. With 29.2% of the population under 18, Castle Rock city has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Castle Rock city is $65,272. This is 31% lower than the state median of $94,952. Compared to the national median of $78,538, household income here is 17% lower. The poverty rate stands at 6.5%. This is 35% lower than the state poverty rate of 9.9%. The unemployment rate is 6.7%. This is 35% higher than the state rate of 5.0%. The median home value is $301,000. Housing costs are 42% lower than the state median of $519,800. The home-value-to-income ratio is 4.6x. 62.0% of occupied housing units are owner-occupied. This homeownership rate is 3% lower than the state average of 63.9%.

Race & Ethnicity

The largest racial or ethnic group in Castle Rock city is White (non-Hispanic), making up 81.4% of the population. Hispanic or Latino residents account for 7.0%. The Asian population (0.8%) is well below the state average of 9.3%.

Education

14.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 62% lower than the state rate of 38.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 90.4%.

Data Sources & Methodology

All demographic data for Castle Rock city, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 631 Census-designated places in Washington. For official data, visit data.census.gov.