Zionville in an unincorporated community located in Watauga County, North Carolina.

The community lies at the North Carolina/Tennessee state line, between Boone and Mountain City, along Old US Highway 421.

[2] In 1866, Tom Dula stopped at the home of Colonel James Grayson and worked at his farm for a few days; soon after, authorities from Wilkes County arrived to arrest him for the murder of Laura Foster.

He was finally found west of Mountain City and was sent back for trial.

In 1962 or 1963, US 421 was moved east to its current alignment, bypassing Zionville.