Castle Dale is a city in northwestern Emery County, Utah, United States. The population was 1,630 at the 2010 census. It is the county seat of Emery County.
The first settlement at Castle Dale was made in 1879.
Castle Dale lies on the north side of Cottonwood Creek, a tributary of the San Rafael River, in Castle Valley.
According to the United States Census Bureau, the city has a total area of 2.2 square miles (5.6 km2), all of it land.
Utah State Route 10 passes through the center of town, leading northeast 31 miles (50 km) to Price and southwest 37 miles (60 km) to Interstate 70.
As of the census of 2000 there were 1,657 people, 508 households, and 420 families residing in the city. The population density was 887.5 people per square mile (342.1/km2). There were 618 housing units at an average density of 331.0 per square mile (127.6/km2). The racial makeup of the city was 95.47% White, 0.06% African American, 0.66% Native American, 0.54% Asian, 0.18% Pacific Islander, 0.91% from other races, and 2.17% from two or more races. Hispanic or Latino of any race were 2.17% of the population.
There were 508 households, out of which 49.2% had children under the age of 18 living with them, 72.6% were married couples living together, 7.1% had a female householder with no husband present, and 17.3% were non-families.