Union Dale is a borough in Susquehanna County, Pennsylvania, United States.

Just outside Union Dale is the North Knob of Elk Mountain.

It is the highest point in Eastern Pennsylvania, as well as in the Allegheny Plateau.

The racial makeup of the borough was 98.5% White, 1.1% African American, and 0.4% from two or more races.

40.8% of all households were made up of individuals, and 15.3% had someone living alone who was 65 years of age or older.