Dillonvale is a village in southern Jefferson County, Ohio, United States.

Nothing much became of the town until the Wheeling and Lake Erie Railway was built through that territory in 1889, at which time a new plat was made and the new names of Dillon, and later Dillonvale, were adopted.

There were 357 housing units at an average density of 915.4 per square mile (353.4/km2).

31.3% of all households were made up of individuals, and 18.4% had someone living alone who was 65 years of age or older.

The racial makeup of the village was 98.46% White, 0.51% African American, 0.13% Asian, and 0.90% from two or more races.

28.6% of all households were made up of individuals, and 18.0% had someone living alone who was 65 years of age or older.

Public education in the village of Dillonvale is provided by the Buckeye Local School District.