Unionville is an unincorporated community in Lewis and Clark County, Montana, United States, four miles south of Helena and approximately two miles west of Jefferson City and accessible from Oro Fino Gulch Drive.

The town maintained its own identity even though it was just a stone's throw from the state capitol.

Although the gold that made the town independently wealthy may be gone, reminders of Unionville's rich history remain there today.

The town is easy to reach for visitors being situated a short distance from Helena.

In spite of a number of abandoned older buildings, it is still inhabited by many longtime and newer residents.