Castle Valley, Utah Demographics & Population 2026

A note before these figures: with a population of 357, Castle Valley's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Castle Valley is a small community located in Utah, within Grand County. The total population is 357. It ranks as the 257th most populous out of 326 Census-designated places in Utah.

Age Demographics

The median age in Castle Valley is 70.7 years. This is 121% higher than the state median of 32.0 years. Only 8.4% of residents are under 18, indicating fewer families with children. 35.3% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Castle Valley is $47,167. This is 50% lower than the state median of $95,166. It is also 42% lower than the national median of $80,734. The ACS records no residents below the poverty line in Castle Valley. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The survey records no unemployed residents in Castle Valley, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $422,600. Housing costs are 14% lower than the state median of $489,400. The home-value-to-income ratio of 9.0x suggests that housing affordability is a significant concern for many residents. 87.4% of occupied housing units are owner-occupied. This homeownership rate is 24% higher than the state average of 70.3%.

Race & Ethnicity

Every resident counted in Castle Valley was recorded as White (non-Hispanic). A figure of exactly 100.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

36.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 4% lower than the state rate of 37.7%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.5%. Notably, 21.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Castle Valley, Utah is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Utah state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 326 Census-designated places in Utah. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.