Castle Hill CDP, California Demographics & Population 2026

Population Overview

Castle Hill CDP is a small community located in California. The total population is 1,303. It ranks as the 994th most populous out of 1,577 cities and towns in California.

Age Demographics

The median age in Castle Hill CDP is 42.6 years. This is 13% higher than the state median of 37.6 years. With 32.2% of the population under 18, Castle Hill CDP has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Castle Hill CDP is $250,001. This is 160% higher than the state median of $96,334. Compared to the national median of $78,538, household income here is 218% higher. The poverty rate stands at 0.4%. This is 97% lower than the state poverty rate of 12.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 0.0%. This is 100% lower than the state rate of 6.4%. The median home value is $2,000,001. Housing costs are 188% higher than the state median of $695,400. The home-value-to-income ratio of 8.0x suggests that housing affordability is a significant concern for many residents. 96.0% of occupied housing units are owner-occupied. This homeownership rate is 72% higher than the state average of 55.8%.

Race & Ethnicity

The largest racial or ethnic group in Castle Hill CDP is White (non-Hispanic), making up 68.8% of the population. Asian residents account for 15.0%. The White (non-Hispanic) population is significantly higher than the state average (68.8% vs 34.6%). The Black or African American population (1.8%) is well below the state average of 5.3%. The Hispanic or Latino population (4.1%) is well below the state average of 39.8%.

Education

79.2% of residents aged 25 and older hold a bachelor's degree or higher. This places Castle Hill CDP in the top 10% of all cities in the state for educational attainment. This is 117% higher than the state rate of 36.5%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 100.0%. Notably, 27.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Castle Hill CDP, California 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 California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,577 Census-designated places in California. For official data, visit data.census.gov.