Dillonvale is a census-designated place (CDP) in Sycamore Township, Hamilton County, Ohio, United States. The population was 3,436 at the 2020 census.
History
Dillonvale started as a housing subdivision planned and built by Dillon Builders in the 1940s.
Geography
According to the United States Census Bureau, the CDP has a total area of , all land.
Demographics
2020 census
As of the census of 2020, there were 3,436 people living in the CDP, for a population density of 3,852.02 people per square mile (1,486.87/km<sup>2</sup>). There were 1,638 housing units. The racial makeup of the CDP was 87.7% White, 3.5% Black or African American, 0.3% Native American, 2.2% Asian, 0.0% Pacific Islander, 0.7% from some other race, and 5.6% from two or more races. 2.7% of the population were Hispanic or Latino of any race.
There were 1,512 households, out of which 25.5% had children under the age of 18 living with them, 50.6% were married couples living together, 24.1% had a male householder with no spouse present, and 21.0% had a female householder with no spouse present. 39.3% of all households were made up of individuals, and 16.0% were someone living alone who was 65 years of age or older. The average household size was 2.22, and the average family size was 3.04.